Patent ID: 6036888
Filing Date: 2000-03-14
Classification: B01D,C23F,Y02C

Abstract:
A method for inhibiting corrosion of metals in contact with an aqueous alkanolamine solution comprising adding to the aqueous alkanolamine solution an effective corrosion inhibiting amount of a sulfur containing heterocyclic ring compound effective as a corrosion inhibitor and having the structure: ##STR3## where R.sub.1 is O, NH, S or CX.sub.2 and R.sub.2 is S or CX.sub.2, and X is independently H, C.sub.1 to C.sub.8 alkyl, C.sub.7 to C.sub.12 alkaryl, C.sub.8 to C.sub.10 aryl, or C.sub.3 to C.sub.10 cycloalkyl, with the proviso that when R.sub.2 is S, R.sub.1 must be CX.sub.2 and when R.sub.1 is O, N or S, R.sub.2 must be CX.sub.2.