CORROSION RESISTANT ACIDIC SOLUTION CONTAINING A TRIVALENT CHROMIUM COMPOUND AND A PROCESS FOR PREPARING A TRIVALENT CHROMIUM COATING ON A SUBSTRATE USING THE SAME

摘要

An acidic aqueous solution containing a water soluble trivalent chromium compound is provided with a additive for improving corrosion resistance and reducing precipitation of trivalent chromium over time. A suitable additive is nitrilotris (methylene) triphosphonic acid (NTMP).