Method of inhibiting metal corrosion by amine-stabilized unsaturated chlorinated hydrocarbons

Claim 1

IN A PROCESS WHEREIN A METAL SELECTED FROM THE CLASS CONSISTING OFFERROUS AND CUPROUS METALS IS EXPOSED TO A HOT, DRY, UNSATRUATED LOW MOLECULAR WEIGHT CHLORINATED HYDROCARBON SELECTED FROM THE CLASS CONSISTING OF TRICHLORETHYLENE AND PERCHLORETHYLENE, AND CONTAINING A STABILIZING AMOUNT OF A VOLATILE ORGANIC NITROGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC AMINES AND HETEROCYCLIC NITROGEN BASES, SAID NITROGEN COMPOUND STABILIZED CHLORINATED HYDROCARBON NORMALLY CAUSING TARRING AND CORROSION OF SAID METAL, THE IMPROVEMENT WHICH COMPRISES INCORPORATING INTO SAID NITROGEN COMPOUND STABILIZED CHLORINATED HYDROCARBON ABOUT .01-5% BY WEIGHT OF AN INHIBITOR FOR SAID METAL TARRING AND CORROSION COMPRISA SUBSTITUTED OXIRANE SELECTED FROM THE CLASS CONSISTING OF EPICHLORHYDRIN, BUTYLENE OXIDE, PENTENE OXIDE, CYCLOHEXENE OXIDE AND 1,2-DIISOBUTYLENE OXIDE.