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Outline
The key influence factors of the entire process of pretreatment, phosphating and electrophoresis are studied through system experiments as well as the influencing mechanisms of such key parameters as surface roughness of plaque, peak density, processing modes of rust preventive oil and pH values of washing process on coating performances are revealed aiming at the coating compatibility issues of deep drawing automobile steel. The research results showed that pH value of washing process over 8.5, cooperating effects of reasonable surface roughness of plaque (Ra≈1.2 μm) and peak density (RPc≥90 cm-1), avoiding manual oiling treatment of plaque are the core of forming high-quality phosphating film and improving corrosion resistance of electrophoretic coating film. This study provides universal process optimization directions and key points of quality control for optimizing the coating compatibility of automobile steel sheets.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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