Electrochemical Deposition and Corrosion Resistance Characterization of FeCoNiCr High-Entropy Alloy Coatings

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

The authors studied the corrosion resistance characteristics of FeCoNiCr high entropy alloy coating. The coating was prepared using the electrochemical co-deposition of the four elements. The manuscript lacks some experiments and explanations.

1. The authors should clarify the importance and novelty of their work whereas HEAs were prepared and investigated many times in the literature before as FeCoNiCr or FeCoNiCrX.

2. In XRD, the authors should represent the diffraction indices of Cu in the text.

3. There's not enough explanation for Fig.2 (SEM).

4. EDS chart is missing.

5. Polarization curves of HEA in H2SO4, NaCl, and NaOH should be merged in the same Figure i.e. merge Figures 4a, 5a, 6a together

6. The work lacks some experiments to clarify the corrosion resistance e.g. Electrochemical impedance spectroscopy.

 

Comments on the Quality of English Language

English language is acceptable

Author Response

“Electrochemical deposition and corrosion resistance characterization of FeCoNiCr high-entropy alloy coatings”

 

First of all, we thank all the constructive and invaluable comments made by the editors and the anonymous reviewers, which are helpful for improving the quality and readability of our paper. The following is a brief summary of the main revisions we have made in response to the comments.

 

1 We have revised the paper carefully according to the opinions, and made some supplementary explanations for some experiments

2 We modified the experimental diagram according to the modification suggestions

3 We have revised the introduction and conclusion according to the revised opinions and added 8 new references, including the references you suggested.

The one-on-one modifications to the manuscript will be presented to you in the attachment Word.

 

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

1. How were the FeCoNiCr HEA coatings prepared by electrochemical deposition, and what were the composition and size characteristics of the deposited particles?
2. What were the corrosion resistance properties of the FeCoNiCr HEA coatings in different solutions, such as 3.5 wt.% NaCl, 1 mol·L⁻1 H2SO4, and 1 mol·L⁻1 NaOH? What were the corrosion mechanisms observed in each solution?
3. In comparison to other types of alloys, what specific advantages did the FeCoNiCr HEA coatings demonstrate in terms of corrosion resistance, as indicated by their Ecorr and icorr values? Were any limitations or drawbacks mentioned in the study?
4. The refrences are old use new articles in the field of the electrodeposition, and compare the electroless and electroposition pros and cons using following refrences:

     5. https://doi.org/10.1016/j.surfcoat.2023.129407      6. https://doi.org/10.1016/j.surfcoat.2022.128457      7. https://doi.org/10.1016/j.surfcoat.2023.129500      8. https://doi.org/10.1002/celc.202100285

1.  

Comments on the Quality of English Language

English language should be improved

Author Response

“Electrochemical deposition and corrosion resistance characterization of FeCoNiCr high-entropy alloy coatings”

 

First of all, we thank all the constructive and invaluable comments made by the editors and the anonymous reviewers, which are helpful for improving the quality and readability of our paper. The following is a brief summary of the main revisions we have made in response to the comments.

 

1 We have revised the paper carefully according to the opinions, and made some supplementary explanations for some experiments

2 We modified the experimental diagram according to the modification suggestions

3 We have revised the introduction and conclusion according to the revised opinions and added 8 new references, including the 4 references you suggested:

[17] Yu, L.; Hao, L.; Wei, L. Hierarchical FeCoNiCr high entropy alloy thin films with combined high strength and excellent corrosion resistance[J]. Materials & Design 2023: 112049.

[18] Zhang, C.; Zhu, J.K.; Zhang, G.Q.. Laser powder bed fusion of nano-TiB2 reinforced FeCoNiCr high-entropy alloy with enhanced strength and firm corrosion resistance[J]. Journal of Alloys and Compounds 2022, 927: 167110.

[19] Chai, W.K.; Lu, T.; Pan, Y. Corrosion behaviors of FeCoNiCrx (x= 0, 0.5, 1.0) multi-principal element alloys: role of Cr-induced segregation[J]. Intermetallics 2020, 116: 106654.

[20] Y. Qiu, M.A. Gibson, H.L. Fraser, N. Birbilis, Corrosion characteristics of high entropy alloys, Mater. Sci. Technol. 31 (10) (2015) 1235–1243.

[22] Muench, F. Electroless plating of metal nanomaterials[J]. ChemElectroChem 2021, 8(16): 2993-3012.

[23] Yazdani, S.; Mesbah, M.; Dupont, V. Microstructure, wear and crack propagation evolution of electrodeposited nickel-nano diamond composite coatings: Molecular dynamic modeling and experimental study[J]. Surface and Coatings Technology 2023, 462: 129500.

[24] Zhang, W.; Xia, W.; Li, B. Influences of Co and process parameters on structure and corrosion properties of nanocrystalline Ni-W-Co ternary alloy film fabricated by electrodeposition at low current density[J]. Surface and Coatings Technology 2022, 439: 128457.

[25] Bian, H.; Wang, R.; Zhang, K. Facile electrodeposition synthesis and super performance of nano-porous Ni-Fe-Cu-Co-W high entropy alloy electrocatalyst[J]. Surface and Coatings Technology 2023, 459: 129407.

The one-on-one modifications to the manuscript will be presented to you in the attachment Word.

 

Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

Manuscript submitted by Xu et al. for the Special Issue "Interfacial Electrochemistry of Coatings Produced or Applied in Solution" of the journal Coatings describes for the first time the preparation of FeCoNiCr HEA coatings in aqueous solvents via electrochemical deposition, which exhibit good corrosion resistance in different environments and are promising for corrosion-protection applications. Extensively characterization of the prepared alloy coating using different methods was conducted. Also, results were well presented and supported by literature references. In my opinion, this work is suitable for this Special Issue, whose one of its aims is to present novel coatings produced by any electrochemical process in solution and their applications, so I propose this article to be accepted for publication in present form.

Author Response

Thank you for your review and support of this manuscript. Wishing you success in your work and a happy life.

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

The authors addressed most of the comments

Comments on the Quality of English Language

Acceptable English language

Reviewer 2 Report

Comments and Suggestions for Authors

The article can be accepted in the present form.