BLACK CHEMICAL CONVERSION COATING, BLACK CHEMICAL CONVERSION COATING TREATMENT LIQUID, METHOD FOR FORMING THE BLACK CHEMICAL CONVERSION COATING, SOLUTION CONTAINING RARE EARTH ELEMENT USED IN THE METHOD FOR FORMING THE CHEMICAL CONVERSION COATING AND MEMBER EQUIPPED WITH THE BLACK CHEMICAL CONVERSION COATING

摘要

PROBLEM TO BE SOLVED: To provide a black chemical conversion coating that is capable of improving blackness without deteriorating corrosion resistance, a black chemical conversion coating treatment liquid, a method for forming the black chemical conversion coating, a solution containing rare earth elements used in the method for forming the chemical conversion coating, and a member equipped with the black chemical conversion coating.;SOLUTION: The black chemical conversion coating is formed on a member having a metal surface. The black chemical conversion coating contains trivalent chromium and 0.0010 g/m² rare earth elements, has a thickness of 100-1,500 nm and is free of hexavalent chromium.;COPYRIGHT: (C)2012,JPO&INPIT