1.The factors causing the scratch on the processing surface of sheet metal chassis are relatively complex and revolve around the whole process of commodity manufacturing, but they can be generally divided into two categories: one is the scratch of commodities during production, and the other is the scratch caused by freight logistics in the production process. 2. The main reason why the coating layer falls off is the lack of adhesion between the coating layer and the substrate. The specific ways to check the adhesion include stress test and cross cutting experiment. 3. Exposed sheet metal substrate means that there is no coating on the surface, and the key factors are missing spray and large-scale scratch. 4. Serious color deviation means that the hue of the same surface is inconsistent, and the color error exceeds 1. 5. Dirt on the bottom layer of sheet metal refers to the defect caused by the untidiness of the substrate surface when the surface is solved, which is the primary reason for the falling of the coating. 6. The basic principle of paint flow and powder deposition in the processing of sheet metal chassis is probably very simple. Only the paint flow is caused by spraying, and the powder deposition is caused by electrostatic spraying, both of which cause defects due to excessive and thick painting.
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