Patent ID: 6071436
Filing Date: 2000-06-06
Classification: C04B,C08G,C23F

Abstract:
A method of inhibiting the corrosion of ferrous metal articles a cementitious composition containing comprising contacting ferrous metal articles with a cementitious composition containing an amidoamine, said amidoamine being the reaction product of a polyalkylenepolyamine and a short-chain alkanedioic acid or reactive derivative thereof in a molar ratio of polyalkylenepolyamine to short-chain dioic acid or reactive derivative thereof greater than 1.3:1, said reaction product being comprised of an amidoamine represented bv the formula:H.sub.2 N--R.sup.1 (--NH--R.sup.2).sub.n --NH(--C(O)--R.sup.3 --C(O)--NH--R.sup.4 (--NH--R.sup.5).sub.n --NH).sub.m Hwherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are alkylene radicals and n and m are independently selected from 1 to about 20.