Aluminum alloy die casting surface pretreatment

1. Oil, water washing, rust removal, water washing, surface conditioning, water washing, phosphating, washing, drying

2. The purpose and importance of pre-processing:

The purpose of pre-treatment is to obtain a good coating. Because the above stamping parts are manufactured, processed, and stored, there will be grease, oxide scale, dust, rust and corrosive substances on the surface. It affects the performance, appearance, etc. of the coating film, so the pretreatment plays an extremely important role in the coating process.

3. The meaning of pre-treatment: pre-coating treatment and coating, drying is the main process of coating process, in which the pre-coating treatment is the basic process, it has the whole coating quality, coating service life, coating appearance, etc. It has an important influence on the surface of the workpiece after degreasing, descaling, phosphating and other processes, and it is uniform and free of grease.

Keyword: aluminum alloy die casting

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