The development of a solution for promotion of corrosion attack on aluminium alloys in a galvanostatic mode

Kutyrev A.E., Chesnokov D.V., Antipov V.V., Vdovin A.I.
UDC
620.193
DOI
10.18577/2307-6046-2018-0-9-105-118
Article PDF (Russian) (881.95 KB)
How to cite
Kutyrev A.E., Chesnokov D.V., Antipov V.V., Vdovin A.I. The development of a solution for promotion of corrosion attack on aluminium alloys in a galvanostatic mode // Proceedings of VIAM. 2018. No. 9. DOI: 10.18577/2307-6046-2018-0-9-105-118. URL: https://test.viam.ru/en/journal/2018/9/11
Keywords
aluminum alloys, pitting corrosion, anodic dissolution, natural exposure, intergranular corrosion, corrosion prediction
Abstract

Anodic dissolution of aluminum alloys in different solutions was studied as a promising approach to imitate corrosion of these alloys in natural environment. The solution, containing sodium nitrate, sodium sulfite and sodium chloride with «Ekomet» additive, which allows formation of pitting corrosion damage, comparable to observed in natural environment, during the anodic polarization, was developed. To promote not only the pitting corrosion, but also intergranular and exfoliation corrosion, additional chlorides were added to the solution. Alternative approach is to perform anodic dissolution in solution, containing nitrates, sulfites and
chlorides, first and then in sulfite-chloride solution.

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