Improvement of the Mechanical Properties and Corrosion Resistance of CSS-42L Steel with a Novel TiAlMoNbW Nitrid Film Deposition
Round 1
Reviewer 1 Report
the manuscript can be accepted in the current form.
Author Response
Thank you for your valuable comments, which helped us to improve the quality of our manuscript. We will do more research on magnetron sputtering of high entropy alloy nitride films in the future.
Reviewer 2 Report
The paper development and English level are appropriate.
Some modifications are required.
1. In 3.3, the author was applied the nano indentation method.
Where did the author measure the area during the nano indentation experiment?
If you measure the surface, is the method appropriate?
(The surface roughness is not flat. It is expected that there will be many errors in the measurement.)
2. In friction test, the author was experimented only 1800s.
I don't think it has anything to do with long-term reliability.
(Because there is no stable region)
What do the authors think?
3. The corrosion resistace method and results are appropriate.
But, for the advanced research, it is recommended to match with an electric circuit and SEM images.
Author Response
Please see the attachment
Author Response File: 
Author Response.pdf
Reviewer 3 Report
Dear colleagues;
I had the opportunity to examine your article in detail. You can reach the points I suggest for the further improvement of the paper in the attached file.
Good luck with your effort..
Comments for author File: Comments.pdf
Author Response
Please see the attachment
Author Response File: Author Response.pdf
Round 2
Reviewer 3 Report
Manuscript ID: coatings-1820145- Rev2
Title Improvement of the mechanical properties and corrosion resistance of CSS-42L steel with a novel TiAlMoNbW nitrid film deposition
In their article, the authors studied improvement of corrosion and wear resistance of CSS-42L steel by grown TiAlMoNbW HEA alloy and HEA-nitrides. The topic is hot-spot and the study contains high novelty. However, the authors have yet to implement some of the changes I suggested in my previous review. However, before the article is published, the points I have given below should be revised. It is essential that these matters be re-examined. Therefore, my decision about the article is that minor revision is needed.
1- Your work is on improving the corrosion resistance of nitride HEAs in H2SO4 and %3.5NaCl environments. Ref. 11 and 12 do not have these environments. Please scan the literature in detail. Boronizing, nitriding and carburizing applications of HEA alloys should be compared with the studies in these (H2SO4, %3.5NaCl environments.
2- There is no reference to carburizing.
3- In Figure 5, the reason for applying different loads to the compared samples is not explained.
4- The claim that modulus of elasticity and hardness values of 313.6 GPa and 25.7 GPa after contact with nitrogen is not supported by the literature. Also, no explanation was provided.
Because I did not come across hardnesses exceeding 1500HV in nitriding. Even in the boronizing of HEAs produced by powder metallurgy, it is in the range of 15-17 GPa. If the hardness of nitrides can be supported from the literature, it is important to compare them with the following borides and carbides. Because nitriding is superior to boronizing and carburizing in terms of fatigue strength.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
