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Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings
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Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Corrosion, Wear and Erosion".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 31761

Special Issue Editors

Dr. Yiran Wang

E-Mail Website
Guest Editor
School of Material Science and Engineering, Xi’an Jiao Tong University, Xi'an, China
Interests: tribology and wear behavior of metals and metal matrix composites; processing engineering of advanced composites
Special Issues, Collections and Topics in MDPI journals
Dr. Liang Sun

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China
Interests: first principle in designing metal matrix composites; material corrosion prevention and strength prediction; preparation of new light alloy materials
Special Issues, Collections and Topics in MDPI journals
Dr. Wenyan Zhai

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China
Interests: tribology and wear behavior of metal matrix composites; preparation of ceramic metal composites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nowadays, tribology, wear and corrosion bring a large amount of economic loss in a variety of areas, such as metallurgy, automobile, energy and chemical industries. Anti-corrosion and lubricating coatings have the advantage of high specific strength and specific stiffness, good heat resistance, self-lubricating and wear resistance, and are urgently needed in the fields of aerospace and critical equipment. In particular, the manufacturing industry puts forward the demand for extreme service performance and scale applications of anti-corrosion and lubricating coatings.

There are many factors that affect anti-corrosion and lubricating coatings (e.g., processing methods, matrix, interface, etc.). However, in the face of deposition, characterization and application, the fundamental research of coatings is not systematic or in-depth. It is widely recognized that important macroscopic properties, i.e., hardness, strength, anti-corrosion, wear-resistance and lubricating, are influenced by the microstructures and fabration details of the coatings. The aim of this Special Issue is to understand the basic principles of deposition, characterization and application of anti-corrosion and lubricating coatings.

The scope of this Special Issue will serve as a forum for papers in the following concepts:

  • Theoretical and experimental research, knowledge and new ideas in anti-corrosion and preventive coatings mechanisms;
  • Recent developments and application in anti-corrosion and lubricating coatings;
  • Anti-corrosion and lubricating coatings produced by different processing and deposition methods;
  • Understanding the degradation mechanisms of coatings through friction, wear or other dynamic loading condition and corrosion;
  • Computer modeling, simulation to predict coating properties, performance, durability and reliability in service environments.

It is our pleasure to invite you to submit your article to this Special Issue. We look forward to receiving your paper for the Special Issue “Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings” of MDPI’s Coatings.

Dr. Yiran Wang
Dr. Liang Sun
Dr. Wenyan Zhai
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • protective corrosion coatings
  • metal matrix composites
  • lubricating coatings
  • interface

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Published Papers (15 papers)

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16 pages, 7640 KiB  
Article
The Effects of the Secondary-Phase Distribution on the Dissolution Rate and Mechanical Properties of Soluble Al-Mg-Ga-In-Sn Alloys
by Boxian Zhao, Keren Zhang, Jinguang Li, Yiwen Ma, Pengfei Wang, Panpan Liu, Yangyang Guo and Hui Zhao
Coatings 2024, 14(9), 1090; https://doi.org/10.3390/coatings14091090 - 25 Aug 2024
Viewed by 802
Abstract
The relationships between microstructure, dissolution, and mechanical properties of a soluble Al-Mg-Ga-In-Sn alloy are investigated in the present study. The findings demonstrate that the influence of low-melting-point elements on the dissolution of aluminum alloys can be attributed to the formation of secondary phases [...] Read more.
The relationships between microstructure, dissolution, and mechanical properties of a soluble Al-Mg-Ga-In-Sn alloy are investigated in the present study. The findings demonstrate that the influence of low-melting-point elements on the dissolution of aluminum alloys can be attributed to the formation of secondary phases composed of Mg2Sn and In3Sn at grain boundaries and their participation in the Al–water reaction. After annealing, the secondary phases at grain boundaries transform from point-like and block-like discontinuous particles to strip-like continuous intergranular phases which envelop the Al matrix, resulting in a 29.8% reduction in the volume. These transformations increase the total contact area of the Al–water interface, amplifying the corrosion current of the annealed alloy to more than 30 times that of the as-cast alloy, thereby accelerating the dissolution rate. Unlike magnesium–lithium alloys, the soluble Al-Mg-Ga-In-Sn alloy exhibits a balanced strength, ductility, and dissolution rate, which presents it as a cost-effective, lightweight, structurally and functionally integrated material for the realm of petroleum exploration. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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16 pages, 49708 KiB  
Article
Effect of Quenching Cooling Rate on Hydrogen Embrittlement of Precipitation-Hardened Martensitic Stainless Steels
by Sicong Shen, Xingyu Ma, Xiaolong Song, Wenwen Zhao and Yong Shen
Coatings 2024, 14(5), 572; https://doi.org/10.3390/coatings14050572 - 6 May 2024
Cited by 1 | Viewed by 1796
Abstract
Heat treatment plays a decisive role in the microstructure of metallic materials. The effect of cooling rate changes caused by the quenching medium on the microstructure of steel materials should be clarified. In this study, the effect of the quenching cooling rate on [...] Read more.
Heat treatment plays a decisive role in the microstructure of metallic materials. The effect of cooling rate changes caused by the quenching medium on the microstructure of steel materials should be clarified. In this study, the effect of the quenching cooling rate on the microstructure of two precipitation-hardened martensitic stainless steels was investigated. The mechanical properties and hydrogen embrittlement susceptibility effected by the changes in the microstructure were also analyzed. A slow tensile test and hydrogen pre-charging were carried out to obtain the hydrogen embrittlement susceptibility parameters of the specimens. The results show that the quenching cooling rate only affects specific microstructures, including the twin structure and misorientation angle. Before hydrogen charging, the mechanical properties of the precipitation-hardened martensitic stainless steels were not affected by changing the quenching cooling rate. After hydrogen charging, the hydrogen embrittlement susceptibility decreased as the quenching cooling rate increased. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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16 pages, 30565 KiB  
Article
Study on Microstructure and Mechanical Properties Modification of Cu-Ti3AlC2 Composites by Ni Element
by Yiran Wang, Liujie Xu and Xiuqing Li
Coatings 2023, 13(8), 1414; https://doi.org/10.3390/coatings13081414 - 11 Aug 2023
Cited by 1 | Viewed by 1076
Abstract
Ti3AlC2 three-layered ceramics-reinforced copper matrix composites show not only the strength of the copper matrix but also better wear resistance, all while preserving its conductive property and, ultimately, reducing the cost of preparation. However, decomposition in Cu-Ti3AlC2 [...] Read more.
Ti3AlC2 three-layered ceramics-reinforced copper matrix composites show not only the strength of the copper matrix but also better wear resistance, all while preserving its conductive property and, ultimately, reducing the cost of preparation. However, decomposition in Cu-Ti3AlC2 composites mainly occurs due to the severe interdiffusion of Al and Cu elements from Ti3AlC2 particle-grain boundaries, leading to the formation of TiCx. This work explored a practical method to produce Cu reinforced with a Ti3AlC2 particle which keeps an effective ternary layered structure by adding a nickel element. Results show that the addition of Ni elements results in a microstructure composed of Ti3AlC2, TiCx, NixAl, NixTi, and a Cu(Ni) matrix in the Cu-Ni-Ti3AlC2 composites. As the volume fraction of Ti3AlC2 particles increases, the morphologies change from a finely dispersed reinforcement phase to a continuous network, leading to a reduction in hole number and volume compared to Cu-Ti3AlC2 composites. This reduction is especially significant when the volume fraction of Ti3AlC2 exceeds 50%. The formation of NixAl and NixTi compounds at the grain boundary of the reinforcement phase after Ni element alloying restricts the diffusion of Al elements. The addition of Ni elements improves the mechanical properties of the composites. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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17 pages, 11867 KiB  
Article
Study on the Wear Performance of Polyethylene Inner Lining Pipe under Different Load and Mineralization Conditions
by Liqin Ding, Lei Wang, Jie Li, Suoping Qi, Wanli Zhang, Yuntao Xi, Keren Zhang, Shanna Xu, Haitao Liu, Lei Wen, Xinke Xiao and Jiangtao Ji
Coatings 2023, 13(7), 1155; https://doi.org/10.3390/coatings13071155 - 26 Jun 2023
Viewed by 1194
Abstract
This study conducted pin disc friction and wear performance tests on polyethylene-lined oil pipes and four types of centralizing materials (45# steel, nylon, polytetrafluoroethylene (PTFE), and surface alloy coating) in oil fields. The friction coefficient and wear rate were tested, and the wear [...] Read more.
This study conducted pin disc friction and wear performance tests on polyethylene-lined oil pipes and four types of centralizing materials (45# steel, nylon, polytetrafluoroethylene (PTFE), and surface alloy coating) in oil fields. The friction coefficient and wear rate were tested, and the wear mechanism was analyzed using scanning electron microscopy (SEM) and three-dimensional confocal microscopy. Using a combination of experimental testing analysis and theoretical research, a comprehensive evaluation of the current wellbore centering and anti-wear technology for oil was conducted. The experimental results indicate that the usage limit of polyethylene-lined oil pipes is 400 N, and compared to metal oil pipe materials, the wear rate of both stabilizing material and tubing material is lower, indicating that it has a certain service life. From the perspective of testing load, taking into account the factors of friction coefficient and wear rate, the recommended sequence of straightening material for polyethylene lined oil pipes is (1) surface alloy coating, (2) nylon, (3) PTFE, and (4) 45# steel. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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14 pages, 13275 KiB  
Communication
Preparation, Microstructure, and Interface Quality of Cr3C2-NiCr Cladding Layer on the Surface of Q235 Steel
by Wenyan Zhai, Jiajun Nan, Liang Sun, Yiran Wang and Shiqing Wang
Coatings 2023, 13(4), 676; https://doi.org/10.3390/coatings13040676 - 26 Mar 2023
Cited by 6 | Viewed by 1540
Abstract
In this study, a Cr3C2-NiCr cermet cladding layer was prepared on the surface of Q235 steel via a high-speed laser cladding method. The effects of laser power, scanning speed, and overlap rate on the microstructure, cladding quality, and interfacial [...] Read more.
In this study, a Cr3C2-NiCr cermet cladding layer was prepared on the surface of Q235 steel via a high-speed laser cladding method. The effects of laser power, scanning speed, and overlap rate on the microstructure, cladding quality, and interfacial elements diffusion of Cr3C2-NiCr/Q235 steel were studied. The results show that there was an obvious transition layer at the interface of the Cr3C2-NiCr cladding layer and Q235 steel, indicating that the Cr3C2-NiCr cladding layer had an adequate metallurgical bond with the matrix. Fe, Cr, and Ni were diffused distinctly between the cladding layer and the matrix. The height and width of the Cr3C2-NiCr cladding layer increased, while the dilution rate decreased with the increase in the laser power. The maximum thickness of the transition layer was about 50 μm for the 6 mm/s sample, the weld heat affected zone was smaller, and it was shown that the productivity can be effectively improved. The sample with a 40% overlap rate exhibited the best flatness. The optimal laser power, scanning speed, and overlap rate of the Cr3C2-NiCr/Q235 steel were 1500 W, 6 mm/s, and 40%, respectively. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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14 pages, 6764 KiB  
Article
Interfacial Modification of Ti3AlC2/Cu Composites by Multi-Arc Ion Plating Titanium
by Yiran Wang, Yimin Gao and Yilei Fan
Coatings 2022, 12(11), 1754; https://doi.org/10.3390/coatings12111754 - 15 Nov 2022
Viewed by 1463
Abstract
Cu matrix composites reinforced with Ti3AlC2 ceramics can be applied for electrical contact materials, such as vacuum contact material or a pantograph slide plate. However, Ti3AlC2 particles substantially decomposed because lattice diffusion is the main way that [...] Read more.
Cu matrix composites reinforced with Ti3AlC2 ceramics can be applied for electrical contact materials, such as vacuum contact material or a pantograph slide plate. However, Ti3AlC2 particles substantially decomposed because lattice diffusion is the main way that Al atoms diffused into the Cu matrix and were uniformly distributed. In order to suppress the decomposition of Ti3AlC2 ceramics and improve the properties of Ti3AlC2/Cu composites, the surface of Ti3AlC2 was modified by multi-arc ion plating Ti. The results shows that, with the volume fraction increasing of Ti3AlC2, the decomposition of Ti3AlC2 is exacerbated and the lattice constant of Cu(Al) solid solution is bigger. In the meanwhile, the structure of Ti3AlC2 changes from dispersed granules to flakes, then to a continuous network. Multi-arc ion plating Ti effectively inhibits the diffusion of Al atoms into Cu matrix. The Ti coating reacts with Cu and generates CuxTi in the interface between the Cu and Ti coating, which inhibits the diffusion of Al atoms so as to inhibit decomposition., the inhibition of decomposition of Ti3AlC2 ceramics weakened solid solution strengthening and decreased the content of hard phase TiCx. Furthermore, the good mutual diffusion between CuxTi layer and Cu effectively improves the interfacial bonding strength. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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11 pages, 4018 KiB  
Article
Effect of Expansion Deformation on the Mechanical Properties and Corrosion Resistance of an AISI 304 Stainless Steel Tube in Water from an Oilfield
by Xiaoming Ren, Wenfei Yang, Lidong He, Dejun Li and Juntao Yuan
Coatings 2022, 12(10), 1415; https://doi.org/10.3390/coatings12101415 - 27 Sep 2022
Cited by 2 | Viewed by 1403
Abstract
The effects of expansion deformation on the mechanical properties and corrosion resistance of an AISI 304 stainless steel (SS) tube with dimensions of ϕ 108 mm × 6 mm were studied with a full-scale test, a mechanical property test, microstructural analysis and a [...] Read more.
The effects of expansion deformation on the mechanical properties and corrosion resistance of an AISI 304 stainless steel (SS) tube with dimensions of ϕ 108 mm × 6 mm were studied with a full-scale test, a mechanical property test, microstructural analysis and a corrosion property test in order to explore the feasibility of using AISI 304 SS tubes as solid expandable tubes in repairing damaged well casings. The results showed that the AISI 304 SS tube had good expansion performance, suitable strength after expansion and excellent corrosion resistance, and it met the technical requirements for repairing the casings of common oil wells. After ~11% radial expansion, the internal pressure strength and collapsing strength of the tube were 71 and 32 MPa, respectively. The increase in dislocations, and in the formation of strain-induced martensite and twinning stimulated by plastic deformation, led to the yield strength of the AISI 304 SS tube increasing from 249 to 539 MPa; however, the corrosion resistance of the AISI 304 SS tube was somewhat worsened because of the increase in dislocations and strain-induced martensite caused by expansion deformation. However, the corrosion resistance of the AISI 304 SS tube was still much better than that of conventional casings. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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19 pages, 15936 KiB  
Article
Corrosion Behavior of J55 and N80 Carbon Steels in Simulated Formation Water under Different CO2 Partial Pressures
by Shixia Cheng, Xuehui Zhao, Anqing Fu, Dejun Li, Chengxian Yin and Yaorong Feng
Coatings 2022, 12(10), 1402; https://doi.org/10.3390/coatings12101402 - 26 Sep 2022
Cited by 3 | Viewed by 1636
Abstract
The purpose of this paper is to reveal the corrosion behavior of J55 and N80 carbon steels in formation water under oil wells at different partial pressures, explore the formation process of corrosion product films under supercritical CO2 conditions, and analyze the [...] Read more.
The purpose of this paper is to reveal the corrosion behavior of J55 and N80 carbon steels in formation water under oil wells at different partial pressures, explore the formation process of corrosion product films under supercritical CO2 conditions, and analyze the reasons why the microstructure of carbon steel affects the corrosion behavior. The results show that the corrosion rate gradually increases with the increase in CO2 partial pressure. When the pressure exceeds 10 MPa, the corrosion rate of J55 increases slightly, and that of N80 decreases slightly. Under different partial pressures, the surface composition of the corrosion product film of J55 steel is FeCO3, and that of N80 steel is FeCO3 with a small amount of Fe3C. The analysis shows that the corrosion product films of two kinds of carbon steels can be divided into three layers under the condition of supercritical CO2. There are holes in the middle layer, which are formed first, and then the inner layer and the outer layer are formed at the same time. It is believed that the difference in the morphology and distribution of Fe3C is the reason why the corrosion rate of J55 steel is lower than that of N80 steel. Fe3C in J55 steel is lamellar, which can anchor FeCO3, promote the formation of corrosion product films, and improve the compactness of corrosion product films. However, the Fe3C in N80 is granular and dispersed in the ferrite matrix, which makes it easy to fall off the surface, form pits, and destroy the integrity of the corrosion product film. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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14 pages, 2574 KiB  
Article
Identification and Analysis of Corrosion Mechanisms for Ground Pipelines with Hanging Rings
by Yuntao Xi, Yidi Li, Yang Yao, Qingming Gan, Yixu Wang, Lei Wang, Lei Wen, Shilei Li, Daoyong Yang, Jiangtao Ji and Shubin Lei
Coatings 2022, 12(9), 1257; https://doi.org/10.3390/coatings12091257 - 28 Aug 2022
Cited by 1 | Viewed by 1585
Abstract
Recently, corrosion perforation has been frequently seen in surface pipelines in the oil and gas industry, resulting in operational and environmental challenges. Due to the complex characteristics and mechanisms of such corrosion, a new and pragmatic method has been designed to identify and [...] Read more.
Recently, corrosion perforation has been frequently seen in surface pipelines in the oil and gas industry, resulting in operational and environmental challenges. Due to the complex characteristics and mechanisms of such corrosion, a new and pragmatic method has been designed to identify and evaluate the corrosion phenomenon via a hanging ring installed in a surface pipeline. In addition to respectively analyzing the ions of water samples with chemical titration, ion chromatography, and mass spectrometry, the micro-surface morphology of the corroded hanging rings was observed and evaluated by using a scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS), and the surface composition of the corroded hanging rings was analyzed by using X-ray diffraction (XRD). The water ions of each selected position were found to mainly contain Ca2+, Ba2+, SO42−, and HCO3−, while the barium scale and calcium carbonate scale were formed in situ. In addition to the common corrosion induced by CO2, corrosion induced by both CO2 and H2S leads to extremely serious corrosion and scaling in surface pipelines. In addition, the injection dose of corrosion inhibitor was also evaluated. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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24 pages, 18973 KiB  
Article
Sintering-Induced Failure Mechanism of Thermal Barrier Coatings and Sintering-Resistant Design
by Li-Shuang Wang, Jin-Bao Song, Hui Dong and Jian-Tao Yao
Coatings 2022, 12(8), 1083; https://doi.org/10.3390/coatings12081083 - 31 Jul 2022
Cited by 7 | Viewed by 2648
Abstract
Thermal barrier coatings (TBCs) have been developed to protect superalloys against high-temperature heat fluxes, which are required for the development of high-performance gas turbines. TBCs have porous structures, which are densified by sintering. The resulting stiffening is a major cause of TBC failure [...] Read more.
Thermal barrier coatings (TBCs) have been developed to protect superalloys against high-temperature heat fluxes, which are required for the development of high-performance gas turbines. TBCs have porous structures, which are densified by sintering. The resulting stiffening is a major cause of TBC failure in service. Therefore, there is a need to reduce the negative sintering effect on the life span of TBCs. In this study, the sintering mechanism and the dominant factors causing changes in stiffening and mechanical properties were revealed experimentally. The experimental results show that the multiscale undulation of the originally smooth two-dimensional (2D) pore inner surface triggers multipoint contact between the upper and lower inner surfaces, resulting in pore healing during thermal exposure. The healing of 2D pores is the main structural characteristic change in TBCs after thermal exposure and the main reason for the stiffening and changes in mechanical properties. Then, the sintering effect on TBCs with vertically cracked structures was designed and simulated. We found that implanting vertical cracks in the topcoat can reduce the sintering effect and driving force for cracking by 87.9% and 79.9%, respectively. The degree of reduction depends on the space between vertical cracks. Finally, the mechanism responsible for the sintering-resistant TBCs was analyzed and discussed. Vertically cracked structures exhibited scale-sensitive stiffening, indicating that macroscopic stiffening is much lower than microscopic stiffening. In other words, the macroscopic sintering effect was lowered, and the TBCs remained highly resistant to global strain during thermal exposure. The resulting strain energy release rates are much lower than those of conventional TBCs. The results of this study contribute to the long-life thermal protection of superalloy-based components used in advanced gas turbines. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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12 pages, 6317 KiB  
Article
Effect of Cold Rolling on the Microstructural Evolution and Mechanical Properties of Fe-25Mn-3Si-3Al-0.3Nb TWIP Steel
by Dejun Li, Jianhua Guo, Fei He, Yaorong Feng, Dashan Guo, Fengzhang Ren, Feng Cao, Qi Yang and Wei Shi
Coatings 2022, 12(7), 900; https://doi.org/10.3390/coatings12070900 - 25 Jun 2022
Cited by 2 | Viewed by 2193
Abstract
The microstructural evolution, deformation mechanism and mechanical properties of Fe-25Mn-3Si-3Al-0.3Nb steel in the process of cold rolling were studied by optical microscopy, scanning microscopy, transmission electron microscopy, X-ray diffractometry, tensile testing and microhardness tests. A high-density dislocation structure and a small number of [...] Read more.
The microstructural evolution, deformation mechanism and mechanical properties of Fe-25Mn-3Si-3Al-0.3Nb steel in the process of cold rolling were studied by optical microscopy, scanning microscopy, transmission electron microscopy, X-ray diffractometry, tensile testing and microhardness tests. A high-density dislocation structure and a small number of strain-induced twins appeared in the microstructure of the steel at 30% strain. At 50% strain, the strain-induced twins in austenite increased conspicuously, and the lamella thickness of the twins decreased. At 70% strain, the original grains were clearly refined by the micro-shear bands and twinning intersections to form a large number of sub-grains, and some sub-grains were at the nanoscale. The steel still remained a single-phase austenite during cold rolling even if the strain was as high as 70%. The plastic deformation mechanism of the steel was not changed through the addition of 0.3 wt.% Nb, and both dislocation slipping and twinning were still the fundamental plastic deformation mechanisms for the steel. Furthermore, cold rolling led to a drastic rise in the strength and hardness of the steel, but a remarkable decrease in the elongation. The characteristics of micropore aggregation fractures could always be observed on the fracture surface of static tensile specimens with various strains. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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10 pages, 3687 KiB  
Article
Microstructure, Mechanical, and Electrochemical Properties of SiC Particle Reinforced CoCrFeNiCu High-Entropy Alloy Coatings
by Li Xu, Huiling Du, Jia Liu, Danni Feng and Siyu Xia
Coatings 2022, 12(4), 519; https://doi.org/10.3390/coatings12040519 - 11 Apr 2022
Cited by 10 | Viewed by 2453
Abstract
SiC particle reinforced CoCrFeNiCu high-entropy alloy (HEA) coatings (CoCrFeNiCu(SiC)x, x = 0, 5, 10, 15 wt%) were successfully fabricated on 316L stainless steel via laser cladding technique. The effects of SiC particles on the microstructure, mechanical, and electrochemical properties of CoCrFeNiCu [...] Read more.
SiC particle reinforced CoCrFeNiCu high-entropy alloy (HEA) coatings (CoCrFeNiCu(SiC)x, x = 0, 5, 10, 15 wt%) were successfully fabricated on 316L stainless steel via laser cladding technique. The effects of SiC particles on the microstructure, mechanical, and electrochemical properties of CoCrFeNiCu HEA were investigated. The results showed that the as-fabricated CoCrFeNiCu(SiC)x HEA coatings is a FCC structure, and a secondary phase formed of Cr7C3 at the grain boundaries. Grain boundary strengthening enhances the mechanical properties of CoCrFeNiCu(SiC)x HEA coatings. Especially for CoCrFeNiCu(SiC)15 HEA coatings, the microhardness, wear weight, and friction coefficient were 568.4 HV, 0.9 mg, and 0.35, respectively. With the increasing of SiC content, the corrosion resistance of CoCrFeNiCu(SiC)x HEA coatings was enhanced in 3.5% NaCl solution. The CoCrFeNiCu(SiC)10 coatings showed better performance than others when they were evaluated for corrosion. These results indicated that the CoCrFeNiCu(SiC)x HEA coatings could significantly enhance the wear, friction, and corrosion resistance properties of the 316L stainless steel. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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12 pages, 5151 KiB  
Article
Preparation and Strengthening Mechanisms of Ultrasonic-Assisted Cr3C2 Particle-Reinforced Al Matrix Composite
by Yisong Xue, Wenyan Zhai, Xiao Li, Liang Sun, Yiran Wang, Yanming Liu and Hui Dong
Coatings 2022, 12(4), 459; https://doi.org/10.3390/coatings12040459 - 28 Mar 2022
Cited by 2 | Viewed by 1797
Abstract
A novelty Al matrix composite reinforced with Cr3C2 particles was prepared by an ultrasound vibration treatment-assisted casting process. The Cr3C2 content on the microstructure and mechanical properties of Cr3C2p/Al composite were researched systematically. [...] Read more.
A novelty Al matrix composite reinforced with Cr3C2 particles was prepared by an ultrasound vibration treatment-assisted casting process. The Cr3C2 content on the microstructure and mechanical properties of Cr3C2p/Al composite were researched systematically. The results indicated that Cr3C2 particles were effectively distributed around the grain boundary and led to a great reduction in crystalline size. The density, porosity, and Vickers hardness of the composites rose simultaneously with the increase of Cr3C2 content. Meanwhile, the tensile strength and yield strength increased by 104.5% and 85.7%, respectively by adding 3.0 wt. % Cr3C2. The fracture morphologies showed that the fracture mechanism was plastic fracture for the pure Al and gradually transformed to brittle fracture as the content of Cr3C2 exceeded 3.0 wt. %. Moreover, the strengthening mechanism of the composite was also discussed. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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13 pages, 6729 KiB  
Article
The Influence of Pickling Treatment Parameters on the Surface State and Pre-Passivation Behavior of Super 13Cr Martensitic Stainless Steel
by Hui Dong, Zhuo Luo, Yan Han, Yan-Ming Liu, Liang Sun and Wen-Yan Zhai
Coatings 2022, 12(2), 127; https://doi.org/10.3390/coatings12020127 - 23 Jan 2022
Cited by 4 | Viewed by 3261
Abstract
As a pre-treatment process in the pre-passivation of stainless steel, pickling treatment has a significant effect on the formation of the pre-passivation film. Thus, the surface composition and defects of Super 13Cr martensitic stainless steel (Super 13Cr) were evaluated under different pickling parameters [...] Read more.
As a pre-treatment process in the pre-passivation of stainless steel, pickling treatment has a significant effect on the formation of the pre-passivation film. Thus, the surface composition and defects of Super 13Cr martensitic stainless steel (Super 13Cr) were evaluated under different pickling parameters to further improve the corrosion resistance of the pre-passivation film. The samples were prepared using the acid immersion method and by changing the immersion duration and the acid concentration. The inclusion and chemical composition on the Super 13Cr surface were characterized via a scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDS). The pickling treatment contributes little to the morphology, dimension, and other characteristic parameters of the inclusions. With the increasing duration and acidification concentration, the Cr content on the surface of Super 13Cr increases initially and then decreases. By contrast, the Fe content decreases initially and then increases. The pickling parameters corresponding to the lowest Fe content and the highest Cr content are identical, i.e., the exposure duration is 50 s and the acid concentration is 48 g/L. The pickling treatment in this case could be divided into two stages: outer film dissolution and inner film dissolution. The pickling parameters basically contribute little to the defects of martensitic stainless steel but can significantly affect the surface Cr and Fe content. Retaining the Cr-enriched inner layer could improve the content of Cr in the pre-passivation film and then improve the corrosion resistance of the film. Thus, compared with the original sample with native film, the corrosion resistance of the sample with a Cr-enriched inner layer improved by a factor of about 40. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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42 pages, 46574 KiB  
Review
Multi-Scale Structural Design and Advanced Materials for Thermal Barrier Coatings with High Thermal Insulation: A Review
by Jinbao Song, Lishuang Wang, Jiantao Yao and Hui Dong
Coatings 2023, 13(2), 343; https://doi.org/10.3390/coatings13020343 - 2 Feb 2023
Cited by 9 | Viewed by 4928
Abstract
Thermal barrier coatings (TBCs) are a fundamental technology used in high-temperature applications to protect superalloy substrate components. However, extreme high-temperature environments present many challenges for TBCs, such as the degradation of their thermal and mechanical properties. Hence, highly insulating, long-life TBCs must be [...] Read more.
Thermal barrier coatings (TBCs) are a fundamental technology used in high-temperature applications to protect superalloy substrate components. However, extreme high-temperature environments present many challenges for TBCs, such as the degradation of their thermal and mechanical properties. Hence, highly insulating, long-life TBCs must be developed to meet higher industrial efficiency. This paper reviews the main factors influencing the thermal insulation performance of TBCs, such as material, coating thickness, and structure. The heat transfer mechanism of the coating is summarized, and the degradation mechanism of the thermal insulation is analyzed from the perspective of the coating structure. Finally, the recent advances in improving the thermal insulation and lifetime of coatings are reviewed in terms of advanced materials and structural design, which will benefit advanced TBCs in future engineering applications and provide guidance for the next generation of high thermal insulating TBCs. Full article
(This article belongs to the Special Issue Deposition, Characterization and Application of Anti-corrosion and Lubricating Coatings)
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