Anti-corrosion treatment liquid for the end face of plated steel sheet, chemical conversion treatment method of the end face of plated steel sheet, chemical conversion treatment steel sheet and molded products

摘要

An object of the present invention is to provide a single-sided rust preventive treatment liquid capable of forming a chemical conversion treatment film having higher corrosion resistance. The above object is an organic resin containing a fluororesin, a compound containing a group 4 element or an ion of a group 4 element, an ester compound of adipic acid or phthalic acid and an alcohol having 1 to 3 carbon atoms, and n-methyl It is achieved by a rust prevention treatment liquid on the end face of a plated steel sheet containing at least one bonding accelerator selected from the group consisting of -2-pyrrolidone and a silane coupling agent.