Method of manufacture of scroll compressors and scroll compressors manufactured thereby

A method of manufacture of a scroll compressor, in particular of the pretreatment for the coating of areas in contact with one another during operation of the scroll compressor, wherein the scroll compressor is developed with a non-movable spiral with a base plate and a spiral-form wall, extending from one side of the base plate, as well as with a movable spiral with a base plate and a spiral-form wall extending from a front side of the base plate and the spirals are developed out of a basis material, the method comprising the following steps:

• degreasing of an area to be coated of a surface of one of the spirals,
• etching of the area using an alkaline etching agent,
• etching of the area using an acidic etching agent,
• first etching of the area using a zincate etchant containing zinc,
• application of a zincate layer containing zincate as intermediate layer onto the area to be coated,
• further etching of the area using a zincate etchant containing zinc, and
• coating of the treated area using a coating material closing off the surface,
• wherein etching of the area using an alkaline etching agent, etching of the area using an acidic etching agent, and first etching of the area using a zincate etchant containing zinc are provided before application of the zincate layer containing zincate as intermediate layer onto the area to be coated;
• further comprising the following steps as intermediate steps between the application of the zincate layer and the further etching of the area using the zincate etchant:
• second etching of the area using an alkaline etching agent,
• second etching of the area using an acidic etching agent,
• second etching of the area using a zincate etchant containing zinc, and
• application of a second zincate layer comprising zincate as an intermediate layer onto the area to be coated.