A process is disclosed for inhibiting corrosion of an iron based metal in contact with the system water in an aqueous system, which comprises incorporating into the system water an effective amount of bis-phosphonic acid ethers selected from the group consisting of compounds having the formula (HO).sub.2 OP--R--(OR').sub.n --OR--PO(OH).sub.2 wherein each R is independently selected from the group consisting of methylene and ethylene, wherein R' is selected from the group consisting of methylene, ethylene and ethylene substituted with one or more methyl groups and wherein n is an integer from 0 to 4, and water soluble salts of said bis-phosphonic acid ethers. Advantageous corrosion inhibition using the bis-phosphonic acid ethers in combination with hydroxymethylphosphonic acid is also disclosed.
本发明揭示了一种用于抑制
铁基
金属在
水系统中与系统
水接触时腐蚀的过程,其中包括将有效量的
双膦酸醚化合物加入系统
水中,所述
双膦酸醚化合物选择自以下化合物组:具有式(HO).sub.2OP-R-(OR').sub.n-OR-PO(OH).sub.2的化合物,其中每个R独立地选择自甲基和
乙烯基,其中R'选择自甲基、
乙烯基和一个或多个甲基基团取代的
乙烯基,n为0至4的整数,以及所述
双膦酸醚化合物的
水溶性盐。本发明还揭示了使用
双膦酸醚化合物与
羟甲基膦酸组合的有利的防腐蚀作用。