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2020 №08 (02) DOI of Article
10.37434/as2020.08.03
2020 №08 (04)

Automatic Welding 2020 #08
Avtomaticheskaya Svarka (Automatic Welding), #8, 2020, pp. 20-26

Application of plasma-powder and electric arc coatings to increase tribocorrosion resistance of steels in aggressive environment

V.I. Pokhmursky1, M.S. Khoma1, I.O. Ryabtsev2, Ye.F. Pereplyotchikov1, V.A. Vynar1
1G.V. Karpenko Physical-Mechanical Institute of the NAS of Ukraine, 5 Naukova Str., 79060, Lviv, Ukraine, E-mail: pminasu@ipm.lviv.ua
2E.O. Paton Electric Welding Institute of the NAS of Ukraine, 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

The corrosion and tribocorrosion characteristics of plasma-powder and electric arc coatings on tubular steels in chloridecontaining media with hydrogen sulfide and ammonium were studied. It was established that the corrosion resistance of coatings applied by plasma-powder surfacing and electric arc spraying increases with increasing pH of the solution. It was shown that in these media the most resistant to corrosion and mechanical fracture were the coatings that were deposited by the plasma method of powder of 08Kh17N35S3R alloy. It was established that electric arc coatings sprayed using the flux-cored wire 75Kh19RЗS2 reduce the corrosion current density of carbon steels in hydrogen sulfide solution by 40%. In the same medium on the surface of the coatings sulfide compounds are formed, which during friction act as a solid lubricant, which reduces the wear of the material by 40...42%. The electric arc coatings produced by the flux-cored wire 75Kh19RЗS2 were proposed to be used to restore damaged surfaces of parts and protect them from corrosion and abrasive wear in the hydrogen sulfide media. 14 Ref., 5 Tabl., 4 Fig.
Keywords: plasma-powder surfacing, electric arc coatings, corrosion, tribocorrosion, chlorides, hydrogen sulfide, ammonium

Received: 07.05.2020

References

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