Optimization of the formation technology of tripolyphosphate coating on mild steel

Tripolyphosphate conversion coatings are promising due to the active type of anti-corrosion protection. However, to be introduced into production, it is necessary to optimize the technology of tripolyphosphate coating deposition. Coatings were deposited to samples of st05kp cold-rolled sheet steel (...

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Autores principales:	Vadym Kovalenko, Valerii Kotok
Formato:	article
Lenguaje:	EN RU UK
Publicado:	PC Technology Center 2021
Materias:	sodium tripolyphosphate conversion coating corrosion-protective properties phosphating tripolyphosphate coating Technology (General) T1-995 Industry HD2321-4730.9
Acceso en línea:	https://doaj.org/article/960ec629f2084bbc977a9ea3f25b6553
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spelling	oai:doaj.org-article:960ec629f2084bbc977a9ea3f25b65532021-11-04T14:09:04ZOptimization of the formation technology of tripolyphosphate coating on mild steel1729-37741729-406110.15587/1729-4061.2021.242409https://doaj.org/article/960ec629f2084bbc977a9ea3f25b65532021-10-01T00:00:00Zhttp://journals.uran.ua/eejet/article/view/242409https://doaj.org/toc/1729-3774https://doaj.org/toc/1729-4061Tripolyphosphate conversion coatings are promising due to the active type of anti-corrosion protection. However, to be introduced into production, it is necessary to optimize the technology of tripolyphosphate coating deposition. Coatings were deposited to samples of st05kp cold-rolled sheet steel (analogs G10050, G10060, 1CR, 2CR, D6-2, DG-2) from aqueous solutions of sodium tripolyphosphate (4 %, 6 %, 10 %, 12 %, 14 %) at t=80 °C by dip coating and sputtering. The specific weight and morphology of the coating were determined. The corrosion-protective capability was studied in the G-4 climatic chamber at 90 °C and 100 % humidity using Akimov's test. The prospects of the dip coating and sputtering methods were shown. It was revealed that in the dip coating method, the specific weight of the coating was 1–4 g/m2 and increased linearly at a rate of 0.3–0.35 g/m2 by 1 % (wt.) Na5P3O10. For the sputtering coating method, it was revealed that at 4–8 % Na5P3O10, the growth rate of the specific weight was 0.2 g/m2 by 1 % Na5P3O10 and the specific weight exceeded that of the coating obtained by the dip coating method, due to accelerated oxygen access and increased coating formation rate. At 10–14 % Na5P3O10, the growth rate of the specific weight was 0.55–0.65 g/m2 by 1 % Na5P3O10. However, the specific weight was lower than that of the coating obtained by the dip coating method, due to the self-compaction of the iron tripolyphosphate matrix and decreased mass of the Na5P3O10 filler. Using accelerated corrosion testing methods, the optimum Na5P3O10 concentration to obtain a coating with the highest corrosion-protective capability was 6 %–10 % (wt.). The correlation of the protective capability of the coating samples with the coating defects and cracks was revealedVadym KovalenkoValerii KotokPC Technology Centerarticlesodium tripolyphosphateconversion coatingcorrosion-protective propertiesphosphatingtripolyphosphate coatingTechnology (General)T1-995IndustryHD2321-4730.9ENRUUKEastern-European Journal of Enterprise Technologies, Vol 5, Iss 6 (113), Pp 73-78 (2021)
institution	DOAJ
collection	DOAJ
language	EN RU UK
topic	sodium tripolyphosphate conversion coating corrosion-protective properties phosphating tripolyphosphate coating Technology (General) T1-995 Industry HD2321-4730.9
spellingShingle	sodium tripolyphosphate conversion coating corrosion-protective properties phosphating tripolyphosphate coating Technology (General) T1-995 Industry HD2321-4730.9 Vadym Kovalenko Valerii Kotok Optimization of the formation technology of tripolyphosphate coating on mild steel
description	Tripolyphosphate conversion coatings are promising due to the active type of anti-corrosion protection. However, to be introduced into production, it is necessary to optimize the technology of tripolyphosphate coating deposition. Coatings were deposited to samples of st05kp cold-rolled sheet steel (analogs G10050, G10060, 1CR, 2CR, D6-2, DG-2) from aqueous solutions of sodium tripolyphosphate (4 %, 6 %, 10 %, 12 %, 14 %) at t=80 °C by dip coating and sputtering. The specific weight and morphology of the coating were determined. The corrosion-protective capability was studied in the G-4 climatic chamber at 90 °C and 100 % humidity using Akimov's test. The prospects of the dip coating and sputtering methods were shown. It was revealed that in the dip coating method, the specific weight of the coating was 1–4 g/m2 and increased linearly at a rate of 0.3–0.35 g/m2 by 1 % (wt.) Na5P3O10. For the sputtering coating method, it was revealed that at 4–8 % Na5P3O10, the growth rate of the specific weight was 0.2 g/m2 by 1 % Na5P3O10 and the specific weight exceeded that of the coating obtained by the dip coating method, due to accelerated oxygen access and increased coating formation rate. At 10–14 % Na5P3O10, the growth rate of the specific weight was 0.55–0.65 g/m2 by 1 % Na5P3O10. However, the specific weight was lower than that of the coating obtained by the dip coating method, due to the self-compaction of the iron tripolyphosphate matrix and decreased mass of the Na5P3O10 filler. Using accelerated corrosion testing methods, the optimum Na5P3O10 concentration to obtain a coating with the highest corrosion-protective capability was 6 %–10 % (wt.). The correlation of the protective capability of the coating samples with the coating defects and cracks was revealed
format	article
author	Vadym Kovalenko Valerii Kotok
author_facet	Vadym Kovalenko Valerii Kotok
author_sort	Vadym Kovalenko
title	Optimization of the formation technology of tripolyphosphate coating on mild steel
title_short	Optimization of the formation technology of tripolyphosphate coating on mild steel
title_full	Optimization of the formation technology of tripolyphosphate coating on mild steel
title_fullStr	Optimization of the formation technology of tripolyphosphate coating on mild steel
title_full_unstemmed	Optimization of the formation technology of tripolyphosphate coating on mild steel
title_sort	optimization of the formation technology of tripolyphosphate coating on mild steel
publisher	PC Technology Center
publishDate	2021
url	https://doaj.org/article/960ec629f2084bbc977a9ea3f25b6553
work_keys_str_mv	AT vadymkovalenko optimizationoftheformationtechnologyoftripolyphosphatecoatingonmildsteel AT valeriikotok optimizationoftheformationtechnologyoftripolyphosphatecoatingonmildsteel
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Optimization of the formation technology of tripolyphosphate coating on mild steel

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