Hub coating process
A wheel and coating technology, applied in the direction of coating, electrolytic coating, electrophoretic coating, etc., can solve the problems of technical parameters to be explored, border crossing and mutual dissolution of color paint, etc., to meet the appearance requirements and achieve the effect of good appearance
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[0023] The best embodiment of the present invention will be described in further detail below.
[0024] The specific steps of the coating process of the wheel hub are:
[0025] 1. Degreasing: Using alkaline degreasing agent, spray degreasing treatment on the hub for 2 minutes at 50°C; spray pressure 0.1-0.15MPa, alkali point: 6-8;
[0026] 2. Water washing: immerse the hub of No. 1 in clean water, the temperature of the water is 40~50℃, the time is 7~8 minutes, the conductivity 7.0;
[0027] 3. Pickling: using the tank immersion method, the formula of pickling rust removal solution: industrial hydrochloric acid with a concentration of 31%, corrosion inhibitor 3%, temperature: 40~50℃, treatment time 3~8 minutes;
[0028] 4. Water washing: Immerse the 3 wheel hubs in clean water, the temperature of the water is 40~50℃, and the conductivity <600μs / cm;
[0029] 5. Passivation: Passivation: using chromium-free passivation agent, immerse the hub in step 4 in the chromium-free passivation agen...
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