Influence of polarizing current form on protective properties of plasma-sprayed electrolytic coating on alloy ML5

Abstract

Magnesium alloys are of great interest to the modern aircraft industry owing to rather high specific strength values. However, the problem of corrosion prevention is not still solved. Plasma electrolytic oxidation is the most promising protective technique for magnesium alloys. In this paper, improving the protective properties of plasma-sprayed electrolytic coating on ML5 casting magnesium alloy via optimization of the current regime is considered. The coatings formed at alternating pulses of the polarizing current are investigated by the electrochemical method. Formation of plasma-sprayed electrolytic coating on ML5 magnesium alloy is theoretically described.