Generally, the surface treatment for sheet metal processing should be as follows:
1. Aluminum alloy castings cannot be treated with sulfuric acid anodizing;
2. Deep grooves or holes usually refer to parts with a depth greater than twice the diameter or opening width, but parts with exquisite craftsmanship and not limited by this will be electroplated, and their inner surfaces will not be completely covered by coatings;
Precautions for sheet metal processing manufacturers when performing sheet metal processing surface treatment
3. In order to improve the corrosion resistance of bright nickel plated steel parts, copper or dark nickel coatings can be used as primers;
Fourthly, zinc based alloy sheets are usually used to process electroplating layers for protective decoration. In order to improve the adhesion of the coating, pre copper or nickel plating is usually required;
5. Spot welded parts can undergo chemical treatment, but electrochemical treatments such as electroplating and anodizing are not allowed;
Precautions for sheet metal processing manufacturers during surface treatment of sheet metal processing
6. For electroplated and oxidized parts with riveting requirements, the processing procedure must first perform electroplating or oxidation before riveting;
7. It is best to perform phosphating treatment on steel parts before spraying to increase the adhesion of the coating.
