New composition for inhibition of corrosion and scaling in water circulation systems comprises dicarboxylic and fatty amine components

摘要

Inhibitive composition for prevention of corrosion and scaling of metallic surfaces in installations using water as the energizing or thermal fluid, comprises a dicarboxylic component (DC) and a fatty amine (AF). An inhibitive composition comprises: (a) a dicarboxylic compound (DC) of formula (I) and its mixtures; and (b) a fatty amine (AF) of formula (II). Z1OOC-(CH2)n-COOZ2 (I) R-(-NH-(CH2)m-)n'-NH2 (II) Z1, Z2 = H, Na, K, NH4+) or 1-4C alkyl; n = 5-12; R = 12-22C aliphatic hydrocarbyl, saturated or unsaturated; m = 2-8; n' = 0-7.