Corrosion Evolution of Nickel Aluminum Bronze in Clean and Sulfide-Polluted Solutions

Round 1

Reviewer 1 Report

The research point is good and can be accepted for publication after making some of the following modifications:

1-     The meanings of all symbols used throughout the manuscript must be added.

2-     In Table 1, the sum of the percentages must be equal to 100%. Complete the rest of the table ratios.

3-     The equation on page 6 should describe all symbols and parameters. Also, the equation needs to be numbered throughout the manuscript.

4-     In Figure 7, (b and d) the flow of relations is not understood as the same curve diagram is repeated twice. It is not possible to distinguish to which relationship the curve belongs. Please rephrase these curves or draw them in two Figures.

Comments for author File: Comments.docx

Author Response

Thank you very much for your comments. We are very glad to take your advice. Please see the response in the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

Overall, the manuscript is well-written and the results are presented clearly. However, there are a few minor comments that I suggest addressing before the paper is accepted for publication in this reputed journal:

1.     Please provide more details on the sample preparation and experimental setup for the SVET technique. This will help readers to better understand the methodology and the reliability of the obtained data.

2.     In the introduction, please provide a more detailed background on the corrosion behavior of NAB alloys in sulfide-polluted seawater. This will help readers to better appreciate the significance of the study.

3.     In the results section, please clarify the units used for the corrosion current and the corrosion rate.

4.     Please provide more details on the SEM and XRD analyses, such as the instrument models used and the parameters of the measurements.

5.     In the introduction, please provide more context on why NAB alloys are important for marine applications and why their corrosion behavior in sulfide-polluted environments is of particular interest.

6.     Please provide more details on the experimental setup and procedures for the global electrochemical techniques, such as the parameters used for the potentiodynamic polarization and EIS measurements.

7.     In the results section, please provide more details on how the corrosion current density was calculated for the SVET measurements.

8.     In the discussion section, please provide more context on how the findings of this study relate to previous research on the corrosion behavior of NAB alloys in sulfide-polluted seawater.

9.     Please consider providing a more detailed explanation of the mechanism by which sulfide modifies the anodic reaction process and causes the observed differences in protection performance.

10.  In the conclusion, please provide a more detailed discussion on the implications of the findings for practical applications, such as the design and maintenance of marine structures.

11.  How does the estimated corrosion mass loss in the sulfide-polluted solution compare to that in the clean environment?

12.  What is the main factor that causes the discrepancy in the protection performance of NAB between the sulfide-free and sulfide-polluted environments, according to the EIS results?

13.  What kind of corrosion product film is formed on the surface of NAB in the sulfide-free solution, and what are its main components?

14.  What is the composition of the corrosion product film formed on the surface of NAB in the sulfide-polluted environment, and why is it vulnerable to aggressive ions?

15.  Kindly add more relevant literatures such as Thakur, A., Kaya, S., Abousalem, A. S., & Kumar, A. (2022). Experimental, DFT and MC simulation analysis of Vicia sativa weed aerial extract as sustainable and eco-benign corrosion inhibitor for mild steel in acidic environment. Sustainable Chemistry and Pharmacy, 29, 100785., Thakur, A., Kumar, A., Kaya, S., Marzouki, R., Zhang, F., & Guo, L. (2022). Recent advancements in surface modification, characterization and functionalization for enhancing the biocompatibility and corrosion resistance of biomedical implants. Coatings, 12(10), 1459.

Author Response

Thank you very much for your comments. We are very glad to take your advice. Please see the response in the attachment.

Author Response File: Author Response.docx

Reviewer 3 Report

The work carried out by the author on the Corrosion evolution of nickel aluminium bronze in clean and sulfide-polluted solutions is of interest to the research community. But, it is required to incorporate further suggestions/comments to improve the manuscript.

1. Don't use I/we in technical writing. Remove from the manuscript.

2. Rewrite the sentence "In the presence of the sulfide, however, multiple active points on the measured metal surface continuously emitted the high corrosion current, which indicated the large tracks of corrosion emerged." for better clarity.

3. What does it mean Traditional electrochemical techniques

4. Abstract should be written in a more quantitative way in terms of percentage improvement.

5. Research gap followed by the objective should be more understandable.

6. The section 3 heading should be Results and Discussion

7. In this sentence, "The third point of 1.71 μA/cm2 arose on the bottom right of site 1 at the immersion of 9 h when the current at point 2 had been exhausted." The verb should has instead of had.

8. The author can provide a scientific explanation of SVET Test Result.

9. The author justifies the statement, "The sulfide prevents the formation of a protective corrosion product layer so that the anode corrosion rate remains fairly high."

10. The author could correct the peak intensity of S 2p. it might be Sp2.

Author Response

Thank you very much for your comments. We are very glad to take your advice. Please see the response in the attachment.

Author Response File: Author Response.docx

Round 2

Reviewer 3 Report

No Comments

Author Response

Thank you for your reply again!