AGENT FOR REDUCING COATING FILM OVERALL FRICTION COEFFICIENT FOR TRIVALENT CHROMATE TREATING SOLUTION, TRIVALENT CHROMATE TREATING SOLUTION AND METHOD FOR PRODUCTION THEREOF, AND TRIVALENT CHROMATE COATING FILM REDUCED IN OVERALL FRICTION COEFFICIENT AND METHOD FOR PRODUCTION THEREOF

摘要

It is an object of the present invention to provide a conversion film obtained by contacting a treating solution based on trivalent chromium with zinc or zinc alloy plating layers, which film does not contain hexavalent chromium, which film has corrosion resistance identical to that of the conversion film obtained by the conventional chromate treatment based on hexavalent chromium, and furthermore which has an overall friction coefficient identical to or lower than that of the conventional hexavalent chromate conversion film. The present invention also provides an agent for reducing a conversion film overall friction coefficient for a trivalent chromate treating solution, which agent contains a quinoline based compound or its derivative.