Atmospheric Products Microstructure of Grade 3 and Grade 45 Steel Metal Corrosion (Brief Communication)

摘要

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, rough 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.