Comparative Studies on Steel Corrosion Resistance of Different Inhibitors in Chloride Environment: The Effects of Multi-Functional Protective Film
Round 1
Reviewer 1 Report
The research work is interesting and worthy to publish. I would suggest to improve the Figures and provide some contemporary issues to novel and interesting to the readers.
Author Response
Point 1: The research work is interesting and worthy to publish. I would suggest to improve the Figures and provide some contemporary issues to novel and interesting to the readers.
Response 1: Thank you for your expert review of the manuscript. Following your recommendation, figures displayed in the manuscript have been replaced with full-size images, , as shown in Figs.3-5 and 7-12. Furthermore, more references related to contemporary issues were inserted into the manuscript.
Author Response File: 
Author Response.docx
Reviewer 2 Report
This paper presents comparative studies on steel corrosion resistance of different inhibitors in chloride environment. The authors have done an interesting research work; however, the following comments need to address:
1. Research gap should be clarified.
2. Significance of the study should be highlighted and discussed.
3. In section 3, ‘Results and discussion’, the authors have mainly reported their observations. More discussions regarding reasons should be added.
4. Figures presenting graphs have low quality.
5. Conclusions of the paper should be developed.
6. The English language of the paper needs revisions.
Author Response
This paper presents comparative studies on steel corrosion resistance of different inhibitors in chloride environment. The authors have done an interesting research work; however, the following comments need to address:
Point 1: Research gap should be clarified.
Response 1: Thank you for your attention. The research gap on the corrosion inhibitors researched previously and we researched was explained in detail, related description has been added in line101-108. Furthermore, the new methods for corrosion monitoring and their advantages were compared in the introduction in line112-153.
Point 2: Significance of the study should be highlighted and discussed.
Response 2: Thank you for your suggestion. The improvement of inhibition efficiency is regarded as a sufficient factor in steel bar interface enhancement. Our developed multi-component corrosion inhibitor maintained a high anti-corrosion level in long-terms. Adsorption and oxidation-reduction reactions occurred on steel bar surface were comparatively analyzed and experimentally determined by the cathodic potential and the reduction peaks in the cyclic voltammetry for the first time. Detailed description was written in the abstract and conclusion(3).
Point 3: In section 3, ‘Results and discussion’, the authors have mainly reported their observations. More discussions regarding reasons should be added.
Point 3: Thank you for your suggestion. The discussion among how the adsorption and oxidation-reduction reactions affect the Rct and how open circuit potential changes negatively were illustrated in the section 3.2 and 3.5.
Point 4: Figures presenting graphs have low quality.
Response 4: Following your recommendation, figures displayed in the manuscript have been replaced with full-size images, as shown in Figs.3-5 and 7-12.
Point 5: Conclusions of the paper should be developed.
Response 5: Thank you for your suggestion. The conclusions of this paper have been improved to clearly show the highlights of this paper, the conclusion was in line 518-539.
Point 6: The English language of the paper needs revisions.
Response 6: Thank you for your attention. The English language of this paper including grammar and words have been checked and improved.
Author Response File: Author Response.docx
Reviewer 3 Report
1. Line 22: “…Fe(MoO4)3)”. – Please correct.
2. Line 148 “Fig. 3 EIS results of steel bars (5 days) soaked for different types corrosion inhibitor.” - Please improve the resolution of the Figure 3.
3. Line 150 “Fig. 4 EIS results of steel bars (30 days) soaked for different types corrosion inhibitor.” - Please improve the resolution of the Figure 4.
4. Line 152 “Fig. 5 EIS results of steel bars (60 days) soaked in different corrosion inhibitors.” - Please improve the resolution of the Figure 5.
5. Line 210 “Fig. 7 Cyclic voltammograms (1st and 5th cycles) of steel bars in SCP solution.” - Please improve the resolution of the Figure 7.
6. Line 212 “Fig. 8 Cyclic voltammograms (1st and 5th cycles) of steel bars in SCP solution with chloride.” - Please improve the resolution of the Figure 8.
7. Please improve the resolutions of the Figures 9-13.
8. Insert a flow chart for your research.
9. What is the novelty of the paper?
10. What is the added value of the paper?
11. A comparative analysis between the results obtained and those reported in the specialized literature is necessary. Insert a Table. A scientific discussion is necessary.
12. The author should refine the abstract and the conclusions.
Author Response
Point 1: Line 22: “…Fe(MoO4)3)”. – Please correct.
Response 1: Thank you. This mistake has been corrected and all of subscript and superscript have been check and corrected.
Point 2: Line 148 “Fig. 3 EIS results of steel bars (5 days) soaked for different types corrosion inhibitor.” - Please improve the resolution of the Figure 3.
Response 2: Thank you for your attention. The Fig.3 in line 271 have been replaced with full-size images.
Point 3: Line 150 “Fig. 4 EIS results of steel bars (30 days) soaked for different types corrosion inhibitor.” - Please improve the resolution of the Figure 4.
Response 3: Thank you for your attention. The Fig.4 in line 275 have been replaced with full-size images.
Point 4: Line 152 “Fig. 5 EIS results of steel bars (60 days) soaked in different corrosion inhibitors.” - Please improve the resolution of the Figure 5.
Response 4: Thank you for your attention. The Fig.5 in line 278 have been replaced with full-size images.
Point 5: Line 210 “Fig. 7 Cyclic voltammograms (1st and 5th cycles) of steel bars in SCP solution.” - Please improve the resolution of the Figure 7.
Response 5: Thank you for your attention. The Fig.7 in line 396 have been replaced with full-size images.
Point 6: Line 212 “Fig. 8 Cyclic voltammograms (1st and 5th cycles) of steel bars in SCP solution with chloride.” - Please improve the resolution of the Figure 8.
Response 6: Thank you for your attention. The Fig.8 in line 401 have been replaced with full-size images.
Point 7: Please improve the resolutions of the Figures 9-13.
Response 7: Thank you for your attention. The Fig.9-13 have been replaced with full-size images.
Point 8: Insert a flow chart for your research.
Response 8: Thank you for your suggest. The flow chart for this research has been inserted in the Fig. 3 in line 210.
Point 9: What is the novelty of the paper?
Response9: The novelty of this paper can be summarized as follows:
(1) Multi-component corrosion inhibitor significantly improved the corrosion resistance of steel bars in the SCP solution over a long period (60 days).
(2) Adsorption and oxidation-reduction reactions occurred on steel bar surface were comparatively analyzed and experimentally determined by the cathodic potential and the reduction peaks in the cyclic voltammetry for the first time.
(3) A “multi-functional protective film” was generated by the synergy of organic and inorganic substance, possessing a superiority inhibition effect and serving as a thick barrier.
(4)Considering its ideal inhibition efficiency and eco-friendly characteristics, multi-component component corrosion inhibitor can be an ideal substitute and has a great application potential for reinforcement concrete in the chloride environment.
Point 10: What is the added value of the paper?
Response10: Thank you for your comment. As an eco-friendly substitute, multi-component corrosion inhibitor possessed similar or even better protecting effect on steel bar in comparison to calcium nitrite. Besides, the concept of “multi-functional protective film” was proposed, providing a new insight to achieve modified anti-corrosion capacity of inhibitors. More description was shown in the abstract in line 157-167.
Point 11: A comparative analysis between the results obtained and those reported in the specialized literature is necessary. Insert a Table. A scientific discussion is necessary.
Response11: Thank you for your suggestion. Corrosion resistance of different types of corrosion inhibitor were listed in the Table 4 in line 387. The comparative analysis between inhibitor our developed and other organic, inorganic or composite inhibitors has been added in section 3.4 in line 363-386.
Point 12: The author should refine the abstract and the conclusions.
Response12: Thank you for your suggestion. The abstract and the conclusions have been thoroughly refined.
Author Response File: Author Response.docx
Reviewer 4 Report
In this paper the following notes should be considered by the authors before any possibility for the publication:
1- The abstract needs more description of the outcomes.
2- More literature should be added to the outcomes.
3- In section 2.1 show pictures of the HBP300 steel bar as well as of the sliced cylindrical specimens.
4- In section 2.2 show pictures of the sample preparation in the lab.
5- In figure 6 unify the size of the font.
6-
4-
Author Response
Point 1:The abstract needs more description of the outcomes.
Response 1: Thank you for your advice. The description of outcomes have been added in abstract, including experimental results and analysis of mechanism.
Point 2: More literature should be added to the outcomes.
Response 2: We have supplemented related description in the paper in the reference [5], [39-49].
Point 3: In section 2.1 show pictures of the HPB300 steel bar as well as of the sliced cylindrical specimens.
Response 3: Thank you for your advice. The picture of polished HPB300 steel bar imbedded in expoy resin has been insert in the Fig. 3(a) in line 209.
Point 4: In section 2.2 show pictures of the sample preparation in the lab.
Response 4: Thank you for your advice. The sample preparation and test process have been exhibited in the Fig.2a-b in line 209.
Point 5: In figure 6 unify the size of the font.
Response 5: Thank you for your attention. The Fig.6 has been redrawn in unified font and replaced the incorrect figure in line 331.
Author Response File: Author Response.docx
Round 2
Reviewer 2 Report
The authors have tried to revise the paper based on the comments. Therefore, the paper can be published.
Author Response
The authors have tried to revise the paper based on the comments. Therefore, the paper can be published.
Response: Thank you for your comment. The English language of this paper including grammar and words have been checked and improved.
Author Response File: Author Response.docx
Reviewer 3 Report
Point 1: Line 22: “…Fe(MoO4)3)”. – Please correct.
Response 1: Thank you. This mistake has been corrected and all of subscript and superscript have been check and corrected.
The correction was not made. Line 25 “Fe(MoO4)3)”
Point 8: Insert a flow chart for your research.
Response 8: Thank you for your suggest. The flow chart for this research has been inserted in the Fig. 3 in line 210.
“Fig. 3 EIS results of steel bars (5 days) soaked for different types corrosion inhibitor.” ???
Fig. 2 Preparation of steel bar electrodes. - Figure is not complete.
Point 9: What is the novelty of the paper?
Response9: The novelty of this paper can be summarized as follows:
(1) Multi-component corrosion inhibitor significantly improved the corrosion resistance of steel bars in the SCP solution over a long period (60 days).
(2) Adsorption and oxidation-reduction reactions occurred on steel bar surface were comparatively analyzed and experimentally determined by the cathodic potential and the reduction peaks in the cyclic voltammetry for the first time.
(3) A “multi-functional protective film” was generated by the synergy of organic and inorganic substance, possessing a superiority inhibition effect and serving as a thick barrier.
(4)Considering its ideal inhibition efficiency and eco-friendly characteristics, multi-component component corrosion inhibitor can be an ideal substitute and has a great application potential for reinforcement concrete in the chloride environment.
Specify the lines in the paper.
The answer must be correlated with “the state of the art”.
Point 10: What is the added value of the paper?
Response10: Thank you for your comment. As an eco-friendly substitute, multi-component corrosion inhibitor possessed similar or even better protecting effect on steel bar in comparison to calcium nitrite. Besides, the concept of “multi-functional protective film” was proposed, providing a new insight to achieve modified anti-corrosion capacity of inhibitors. More description was shown in the abstract in line 157-167.
Line 157-167???
Specify the lines in the paper.
The answer must be correlated with “the state of the art”.
Point 11: A comparative analysis between the results obtained and those reported in the specialized literature is necessary. Insert a Table. A scientific discussion is necessary.
Response11: Thank you for your suggestion. Corrosion resistance of different types of corrosion inhibitor were listed in the Table 4 in line 387. The comparative analysis between inhibitor our developed and other organic, inorganic or composite inhibitors has been added in section 3.4 in line 363-386.
Line 363-386???
Specify the lines in the paper.
The answer must be correlated with “the state of the art”.
Missing a scientific discussion.
Comments for author File: Comments.docx
Author Response
Point 1: Line 22: “…Fe(MoO4)3)”. – Please correct.
Response 1: Thank you. This mistake has been corrected and all of subscript and superscript have been checked and corrected.
The correction was not made. Line 25 “Fe(MoO4)3)”
Response 1: Thank you for your carefully inspect. The Fe(MoO4)3) in this paper should be Fe2(MoO4)3, this mistake has been corrected in the line 25 and line 338 in pdf version and highlighted in yellow.
Point 8: Insert a flow chart for your research.
Response 8: Thank you for your suggest. The flow chart for this research has been inserted in the Fig. 3 in line 210.
“Fig. 3 EIS results of steel bars (5 days) soaked for different types corrosion inhibitor.” ???
Fig. 2 Preparation of steel bar electrodes. - Figure is not complete.
Response 8: Thank you for your suggestion. The titles of Figures 2 and 3 have been optimized, as shown in lines 111-112 and 153, and the titles of Figures 4 and 5 have also been updated in line 155 and line 157.
Point 9: What is the novelty of the paper?
Specify the lines in the paper.
The answer must be correlated with “the state of the art”.
Response9: The novelty of this paper can be summarized as follows:
(1) Multi-component corrosion inhibitor significantly improved the corrosion resistance of steel bars in the SCP solution over a long period (60 days). This part was disscuessed in section 3.2 and 3.3 in line 167-168 and line 204-208 respectively. Moreover, the conclusion (line 331-332) also mentained the opinion.
(2) Adsorption and oxidation-reduction reactions occurred on steel bar surface were comparatively analyzed and experimentally determined by the cathodic potential and the reduction peaks in the cyclic voltammetry for the first time. This conclution could be found in line335-337.
(3) A “multi-functional protective film” was generated by the synergy of organic and inorganic substance, possessing a superiority inhibition effect and serving as a thick barrier. This concluson has been written in line 340-341.
(4)Considering its ideal inhibition efficiency and eco-friendly characteristics, multi-component component corrosion inhibitor can be an ideal substitute and has a great application potential for reinforcement concrete in the chloride environment. This conclution were illustrated in line 341-343.
Point 10: What is the added value of the paper?
Response10: Thank you for your comment. As an eco-friendly substitute, multi-component corrosion inhibitor possessed similar or even better protecting effect on steel bar in comparison to calcium nitrite. Besides, the concept of “multi-functional protective film” was proposed, providing a new insight to achieve modified anti-corrosion capacity of inhibitors. More description was shown in the abstract in line 157-167.
Line 157-167???
Specify the lines in the paper.
The answer must be correlated with “the state of the art”.
Response10: Thank you. The explaination mationed above was corrospond to the lines 26-29 in abstract and marked in yellow.
Point 11: A comparative analysis between the results obtained and those reported in the specialized literature is necessary. Insert a Table. A scientific discussion is necessary.
Response11: Thank you for your suggestion. Corrosion resistance of different types of corrosion inhibitor were listed in the Table 4 in line 387. The comparative analysis between inhibitor our developed and other organic, inorganic or composite inhibitors has been added in section 3.4 in line 363-386.
Line 363-386???
Specify the lines in the paper.
The answer must be correlated with “the state of the art”.
Missing a scientific discussion.
Response11: Thank you for your comment. The manusctript has been revised and the lines in this paper have been changed. The intercepted lines were as follows:
Corrosion resistance of different types of corrosion inhibitor were listed in the Table 4 in line 228. The comparative analysis between inhibitor our developed and other organic, inorganic or composite inhibitors has been added in section 3.4 in lines 211-227.
Besides, all of the referernce cited in this research have been reveled to recent papers
Author Response File: Author Response.docx
Round 3
Reviewer 3 Report
Point 9: What is the novelty of the paper?
Specify the lines in the paper.
The answer must be correlated with “the state of the art”.
Author Response
Point 9: What is the novelty of the paper?
Specify the lines in the paper.
The answer must be correlated with “the state of the art”.
Response9: The novelty of this paper can be summarized as follows:
(1) Protecting mechanism of passive film with multi-component corrosion inhibitor was firstly analyzed by the cyclic voltammetry method. This phenomenon is attributable to the coupling effect of organic component absorpion on steel bar and the formation of protective film related Fe3+ due to inorganic component.
This section was in line 336-340.
(2) This multi-component corrosion inhibitor is an eco-friendly substitute for calcium nitrite which can be applied to reinforcement concrete in chloride environments.
This section was in line 342-344.
Author Response File: Author Response.docx
