Method for coating articles made of aluminium silicon-containing alloys

摘要

The invention relates to mechanical and material engineering and can be used for improving operational characteristics of surfaces of articles made of aluminium and aluminium-silicon alloys. The inventive method for coating articles made of aluminium silicon containing alloys consists of alloy pre-treatment and a micro-arc oxidation. Said alloy pre-treatment is carried out until a structure is formed in which particles of silicon-containing phases are arranged in the form of individual inclusions and/or the chains thereof in such a way that a mean distance between boundaries of the adjacent silicon-containing inclusions on the flat section of material exceeds 5 % of a mean linear dimension of the inclusions. Said invention makes it possible to improve adhesion and mechanical bond between the coating and the oxidised alloy and optimise said alloy with respect to practical operating requirements. The invention also reduces power consumption.