Patent ID: 6982062

Claim:
A process for inhibiting the vapor phase corrosion of drained metal equipment that contains one or more recesses where water can reside which comprises: adding an effective corrosion inhibiting amount of a corrosion inhibitor composition comprising: (a) an aliphatic amine or an aliphatic alkanolamine, (b) an azole selected from the group consisting of (1) tolyltriazole, (2) benzotriazole, and (3) mixtures thereof, and (c) a benzoate, to said drained equipment, such that the weight ratio of aliphatic amine or aliphatic alkanolamine to azole in the composition is from 50:1 to 30:1 and the weight ratio of benzoate to azole in the composition is from 40:1 to 150:1, and such that the corrosion inhibiting composition contains less than 1.0 part of an inorganic salt per hundred parts of corrosion inhibiting composition.