Patent ID: 8123982

Claim:
A method of inhibiting yellow metal corrosion comprising adding to an aqueous system an aqueous solution comprising an effective amount of a yellow metal corrosion inhibitor, said yellow metal corrosion inhibitor comprising the structure where M + is an alkali or alkaline earth metal cation, and R is H, C 1 -C 12 alkyl, aryl or polyaryl, C 1 -C 12 alkaryl, C 1 -C 12 cycloalkly, C 1 -C 12 alkoxy, C 1 -C 12 polyalkoxy, hydroxyl or polyhydroxy, C 1 -C 12 alkylcarboxy, C 1 -C 12 alkylamino, C 1 -C 12 haloalkyl, haloaryl, alkoxyaryl, hydroxyaryl, aminoaryl, carboxyaryl, and combinations or further functionalized variants of the above; adding to the aqueous system an effective amount of isopropyl alcohol to maintain the solubility of the corrosion inhibitor; and associating said yellow metal corrosion inhibitor with a yellow metal.