Passification of zinc surfaces

摘要

I provide a method of coating zinc or zinc plated article with a non-hexavalent chromium oxide protective coating by coating a cleaned zinc or zinc plated article with a permanganate composition having a PH of about 2.0 to about 9.0 and I also provide a passified zinc or zinc plated article having coated thereon a permanganate composition that will allow the article to be painted with an appropriate paint