Car wall door panel and its coating method
A door panel and car wall technology, which is applied in the field of car wall door panels and their coating, can solve the problems of difficulty in forming a permanent wear-resistant and anti-fouling protective coating, poor oil stain resistance and poor scratch resistance of stainless steel panels, etc. To achieve the effect of excellent anti-pollution performance
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Embodiment 1
[0019] First, degrease the degreased SUS304 stainless steel, and use emery abrasive belt to grind the surface to NO.4 standard; then, immerse the stainless steel panel in the chemical conversion solution, at a temperature of 40 ℃ Conditions were treated for 10 minutes, and the chemical conversion solution was composed of 3.2wt% hydroxyethylene diphosphonic acid, 0.8wt% zinc aluminum tripolyphosphate, 4.0wt% nitric acid, 1.2wt% H 2 o 2 , 1.0wt% sodium benzoate and the balance of deionized water, the quality of the formed chemical conversion layer is about 8.0g / m 2 .
Embodiment 2
[0021] First, degrease the degreased SUS430 stainless steel, and use emery abrasive belt to grind the surface to NO.4 standard; then, immerse the stainless steel panel in the chemical conversion solution, at a temperature of 40 ℃ Conditions were treated for 10 minutes, and the chemical conversion solution was composed of 3.2wt% hydroxyethylene diphosphonic acid, 0.8wt% zinc aluminum tripolyphosphate, 4.0wt% nitric acid, 1.2wt% H 2 o 2 , 1.0wt% sodium benzoate and the balance of deionized water, the quality of the formed chemical conversion layer is about 8.0g / m 2 .
Embodiment 3
[0023] First, degrease the degreased SUS304 stainless steel, and use emery abrasive belt to grind the surface to NO.4 standard; then, immerse the stainless steel panel in the chemical conversion solution, at a temperature of 40 ℃ Conditions were treated for 6 minutes, and the chemical conversion solution consisted of 3.5wt% hydroxyethylene diphosphonic acid, 0.6wt% zinc aluminum tripolyphosphate, 3.5wt% nitric acid, 1.5wt% H 2 o 2 , 1.2wt% sodium benzoate and the balance of deionized water, the quality of the formed chemical conversion layer is about 7.2g / m 2 .
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