Investigation of corrosion resistance of aluminum alloy products with protective coatings formed by plasma electrolytic oxidation

Abstract

A methodology for determining the duration of destruction of oxide ceramic coatings is suggested. The coatings were formed on aluminum alloys by plasma electrolytic oxidation (PEO) under the pressure of the corrosion products of the metal substrate. The experimental results that confirm the proposed theoretical description are presented. The studies were performed in a laboratory autoclave according to GOST (State Standard) 9.308. Application of the method makes it possible to predict how long the coatings formed by PEO will last in aggressive media before their destruction.