Patent ID: 6403028
Filing Date: 2002-06-11
Classification: C02F,C23F

Abstract:
A corrosion inhibiting composition comprising:(a) 6,6â€²,6â€³-(1,3,5-triazine-2,4,6-triyltriimino) tris hexanoic acid; and (b) a water-soluble phosphonate oligomer salt having the general formula: H[CHRCHR]nâ€”PO3M2 â€ƒwherein at least one R group in each unit is selected from the group consisting of COOM, CH2OH, phosphono, sulphono, and sulphato groups; and the other R group, which may be the same as or different from the first R group, is selected from the group consisting of hydrogen, COOM, hydroxyl, phosphono, sulphono, sulphato, C1-7alkyl, carboxylate, hydroxyl C1-7alkyl, and C1-7alkenyl groups; each M is a cation such that the phosphonated oligomer salt is water-soluble; and n is from 1 to 6, wherein the weight ratio of (a) to (b) is from 1:9 to 9:1.