ã€China Aluminum Network】Choose what kind of solution will be used to brush the bottom layer, which will directly affect the quality of the coating. According to different substrates, select the appropriate solution. Special nickel has a very high bond strength to most of the metals on the substrate. It is commonly used on substrates such as steel, iron, copper, chromium, and stainless steel. For a substrate with a relatively high hardness, a low-stress solution should be selected. For materials such as cast aluminum and cast aluminum alloys, the materials are relatively loose and the porosity is relatively high. It is not appropriate to use a solution with strong acidity to brush the substrate, and the alkaline copper solution is selected for comparison. Suitable for. The specific process flow is as follows:
1) Electrolytic degreasing with 2# electrocleaning to remove oil.
2) Rinse with tap water.
3) activation with 1 # activation liquid, reverse, l0 ~ 15V, the amount of electricity is 0.7 ~ 1A h / dm2.
4) Rinse with water.
5) Basic copper bottoming. Positive. 6 ~ 8V, 1 ~ 2μm.
6) Rinse with tap water.
7) Brush the working layer.
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