Surface treatment of aluminum alloy by preparation in a plasma atmosphere and treating in a metal salt bath using a no rinse technique, notably for motor vehicle fabrication operations

摘要

Surface treatment of a strip, a sheet or a component in an aluminum alloy comprises: (a) preparation of the surface with the aid of a plasma atmosphere; (b) treatment with the aid of a bath containing between 1 and 10 % by wt of at least one salt of at least one of the metals Si, Ti, Zr, Ce, Co, Mn, Mo or V, in order to form a conversion layer on the strip, sheet or component.