Особливості плазмово-електролітичної обробки силумінів у лужних електролітах

Abstract

The features of silumin AK12M2MgN plasma-electrolytic treatment in alkaline electrolytes were studied. Using PEO allows homogenize the surface layer, reduce the content of alloying components and create conditions for the formation of uniform oxide coatings and incorporation of dopants. It is shown that PEO silumin in alkaline solutions of electrolytes with additives of salts cobalt and / or manganese allows to obtain ceramic-like coatings Al₂O₃ ▪ CoOx and Al₂O₃ ▪ MnOy. It is defined the technological parameters of PEO-treatment of silumin to form oxide coatings with a high content of dopants. The morphology and composition of oxide coatings depend of the electrolyte type. The proposed systems can find application in the technologies of intra-cylindra catalysis to reduce the toxicity of gas emissions of engines and increase their fuel efficiency.