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Process of making long-life thin metal plate for automobile bodies, and thin plate made thereby
Process of making long-life thin metal plate for automobile bodies, and thin plate made thereby
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机译:用于汽车车身的长寿命薄金属板的制造方法以及由此制造的薄板
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摘要
Thin metal plate is cleaned and electrolytically pickled in an acid solution. A zinc layer is electrodeposited on one face of the plate, after which a chrome-chromic oxide coating is deposited on both faces of the plate from a sulphuric acid solution containing compounds of trivalent and exhavalent chrome. The plate is then subjected to a drying- oxidating treatment in air. The plate may be steel having a thickness between 0.1 and 2 mm. The plate may be surface treated by phosphating, and then painted. The chrome-chromic oxide coating may have a thickness between 0.05 and 5 &mgr;m, and the zinc coating a thickness between 1 and 30 &mgr;m.
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