Organic composite coated steel plate

An organic-composite coated steel plate comprising:

• a steel plate provided with a plated layer made of zinc or a zinc-base alloy;
• a chromate-treated layer formed on said plated layer of the steel with a deposition amount ranging from 1 to 200 mg/m.sup.2 in terms of metal chromium;
• and
• a resin film formed on said chromate-treated layer with a thickness ranging from 0.1 to 5 .mu.m;
• wherein the resin film has
• (A) selected from the group consisting of a reaction product (I) between an ethylene-series ionomer resin and an epoxy-group containing compound which is a di- or poly-glycidyl ether of a polyhydric alcohol;
• a mixture of an ethylene-series ionomer resin and an epoxy emulsion;
• a mixture of the reaction product (I) and an epoxy emulsion;
• and a mixture of the reaction product (I), an ethylene-series ionomer resin and an epoxy emulsion, in an amount of 40 to 98% by weight;
• (B) silica particles in an amount of 1 to 40% by weight dispersed throughout the resin;
• and
• (C) an organic lubricant in an amount of 1 to 30% by weight.