Abstract

Kulash K. Syrmanova ^1,2, Zhanat B. Kaldybekova¹, Moldir T. Suleimenova², Yersultan T. Botashev¹, Dilyarom A. Abzalova¹ and Sholpan B. Baizhanova¹

DOI : http://dx.doi.org/10.13005/ojc/330664

This study presents the results of the research devoted to the determination of atmospheric corrosion products of Grade 3 and 45 steel microstructures. By the method of electronic microscopy, a microstructure of internal layers rust after corrosion tests in atmospheric conditions was defined and described. It was found out that the rust has a relatively loose and porous structure, the porosity decreases with increasing depth of the layer and exposure time; the rust layer formed on the underside of the steels is always more porous, roughened and loose than the top; alloying elements, for example, chromium stimulates the formation of a dense and durable layer of rust possessing protective properties. Carried out research allowed to develop the most effective methods of corrosion protection of oil and gas pipeline.

corrosion; microstructure; rust; protection; layer; microscopy; porous structure; pipeline

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