Durability Increase by Polyester Coating of Some Quaternary Copper-Based Alloys Parts

Round 1

Reviewer 1 Report

The article is devoted to the study of the influence of polymer coatings on metal products on the cumulated wear intensity. It was shown that the  polymerization – fixation treatment has a positive influence on the quaternary alloys of CuNiAlSi type because it leads to the decrease of the cumulated wear intensity by about 35%.

It was shown that the polyester layer ensures a good adhesion and a negligible fragility, taking over some of the tensions generated by the contact stresses and prolonged shock during the service life of the gears and metal parts. It was also shown that the percentage values of carbon graphite impregnated in the form of dry powder should be within an optimal range of 5-15%. The authors showed that the effects of coating the metal parts with polyester layers are economically felt as follows:diminution of the average rate of rejects by 5%, respectively diminution by 400 ppm of the loss of  layer’s thickness; diminution of the premature failure by 10%; increase of the service life by 10%.

Comments for author File: Comments.pdf

Author Response

Thanks for your comments.

Reviewer 2 Report

Dear  authors

The work presented is of merit, however, there are shortcomings  that I have highlighted the in the manuscript. 

Additionally, also include before and after wear surface images of the metal parts. Please get professional English help.

Comments for author File: Comments.pdf

Author Response

Dear reviewer

Thank you for your support.

We have made the changes in the manuscript as suggested by you, as follows:

Point 1: Line 36: ”Due to the need to respect the consistency of the cost-quality matrix parameters...”

Response 1: We reformulated the phrase: ”Due to the need to preserve the cost and quality parameters of the matrix…”

Point 2: Line 61: ”Before being coated, the surfaces were polished and submitted to...”

Response 2: We have changed: ”Before being coated, the surfaces were polished and subjected to…”

Point 3: Line 67 and line 76: For Figure 1 and 2

Response 3: We have remove in Figs 1 and 2 the low resolution photos, because the co-authors providing these images have as we speak an internet problem and we decided to remove them instead of waiting from them some enhanced pictures. Consequently, figures legends have changed and are highlighted in red. 

Point 4: Line 92: For Figure 3

Response 4: We put the steps of the technological flow in the figure. Consequently, figure legend has changed. The new legend is written in red.

Point 5: Line 114: For Figure 4

Response 5: We wrote the name on the right and also put the scale in the figure. The new legend is written in red.

Point 6: Line 121: Figure 5.

Response 6: We have removed the brownish background in Figures 5.

Point 7: Line 138: Figure 6.

Response 7: We have removed the brownish background in Figures 6.

Point 8: Line 159 - ”… the polyester layer follows this deformation and does not allow the alloy - alloy contact”.

Response 8: We have changed: ”… the polyester layer follows this deformation and does not allow contact between the two metallic materials”.

Point 9: Line 168: Figure 7.

Response 9: Figure 7 is now provided in better quality.

Point 10: Line 170: Figure 8.

Response 10: Figure 8 is now provided in better quality.

Point 11: Line 178: ” These values indicate a diminution of the cumulated wear intensity by 30% approximately”

Response 11: We have changed: ”These values indicate a decrease of the cumulated wear intensity by 30% approximately.”

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

The authors have satisfied the review comments. The manuscript may be accepted now.