Stages of biofouling and corrosion of steel in the black sea water
Kogan A.M., Nikolaev E.V., Golubev A.V., Laptev A.B., Movenko D.A. Stages of biofouling and corrosion of steel in the black sea water // Proceedings of VIAM. 2019. No. 6. DOI: 10.18577/2307-6046-2019-0-6-84-94. URL: https://test.viam.ru/en/journal/2019/6/9
Keywords
corrosion, micro-organisms, sponges, full-scale climatic testing.
Abstract
The paper presents the analysis of biofouling and corrosion of steel in the black sea water by methods of RSMA and profilometry after their exposure to the Gelendzhik center of climatic tests for 10, 30, 40 and 60 days. As a result of the work, it was found that the greatest influence on the corrosion destruction of the surface of steel 20 samples is exerted by organisms of the invertebrate species – marine sponges of Calcispongiae class. Marine sponges in the process of life emit a large amount of carbon dioxide, which causes a local decrease in the pH of sea water, loss of hardness salts, which leads to the formation of galvanopairs on the surface of the steel sample and accelerate its electrochemical corrosion.
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