Studies on alkyl esters of carboxybenzotriazole as inhibitors for copper corrosion

摘要

A series of alkyl esters (methyl, butyl, hexyl, octyl) derived form carboxybenzotriazole (CBTAH) have been studied as inhibitors for copper. Coupon tests established that the in- hibition efficiency (IE) is concentration, time and pH dependent. At pH～0 the IEs of the octyl and hexyl esters are considerably higher than that for benzotriazole under simialr con- ditions. As pH increases up to approximately 8 the IE of each ester is decreased, but is still sufficient for practical use. for the butyl and methyl esters an opposite trend was observed; IE increased with increased pH.