A study of the use of combined anodic dissolution of aluminum alloys with not high sensibility to IGC evidence from alloy of Al–Li–Cu system with the purpose of predicting loss of mechanical properties at atmospheric corrosion

Kutyrev A.E., Chesnokov D.V., Antipov V.V., Vdovin A.I.
UDC
620.1193:669.815
DOI
10.18577/2307-6046-2021-0-2-109-118
Article PDF (Russian) (634.82 KB)
How to cite
Kutyrev A.E., Chesnokov D.V., Antipov V.V., Vdovin A.I. A study of the use of combined anodic dissolution of aluminum alloys with not high sensibility to IGC evidence from alloy of Al–Li–Cu system with the purpose of predicting loss of mechanical properties at atmospheric corrosion // Proceedings of VIAM. 2021. No. 2. DOI: 10.18577/2307-6046-2021-0-2-109-118. URL: https://test.viam.ru/en/journal/2021/2/12
Keywords
aluminum alloys, pitting corrosion, intergranular corrosion, anodic dissolution, natural exposure, corrosion prediction.
Abstract

The article presents data on combined anodic dissolution of aluminum alloy of Al–Li–Cu system with not high sensibility to intergranular corrosion, consisting in sequential dissolution in two different solutions, with different modes – the ratio of the specific amount of electricity. The obtained corrosion deteriorations were evaluated by optical and confocal microscopy, the dependences of mass loss, the depth of pitting and intergranular corrosion, as well as changes in the tensile strength of the specific amount of electricity for different modes were determined. As a result of the analysis of the obtained data, models for predicting the loss of tensile strength from the value of the specific amount of electricity (or mass loss) in atmospheric corrosion are proposed.

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