High lead solder corrosion inhibitors
First Claim
1. A composition for inhibiting mineral scale and the corrosion of metals in the presence of an aqueous liquid and particularly the corrosion of high lead solder and the cavitation-erosion corrosion of aluminum, comprising:
- A. an effective metal corrosion inhibiting amount of a siloxane-silicate copolymer containing about 0.1 to about 99.9 parts by weight, per 100 parts by weight of said copolymer, of (a) at least one siloxane group represented by the formula;
space="preserve" listing-type="equation">RSiO.sub.1.5 wherein R is selected from the group consisting of a monovalent aliphatic hydrocarbon having 1 to about 18 carbon atoms, a phenyl group, and a vinyl group and 0.1 to 99.9 parts by weight, per 100 parts by weight of said copolymer, of (b) at least one silicate group represented by the formula;
##EQU2## wherein M is a cation which forms a water-soluble silicate, d is the valence of the cation represented by M and has a value of at least 1 and e has a value of 1 to 3 andB. an effective metal corrosion inhibiting amount of an azole.
5 Assignments
0 Petitions
Accused Products
Abstract
Compositions and method of using said compositions for inhibiting mineral scale and the corrosion of high lead solder and the cavitation-erosion corrosion of aluminum in aqueous systems are disclosed. Unexpectedly, a mixture of a siloxane-silicate copolymer with an azole is effective in reducing the corrosion of high lead solder and aluminum, particularly the cavitation-erosion corrosion of aluminum in contact with aqueous liquids, such as aqueous alcohol solutions used as heat transfer media. Antifreeze concentrates and a process for inhibiting corrosion are also disclosed.
41 Citations
17 Claims
-
1. A composition for inhibiting mineral scale and the corrosion of metals in the presence of an aqueous liquid and particularly the corrosion of high lead solder and the cavitation-erosion corrosion of aluminum, comprising:
-
A. an effective metal corrosion inhibiting amount of a siloxane-silicate copolymer containing about 0.1 to about 99.9 parts by weight, per 100 parts by weight of said copolymer, of (a) at least one siloxane group represented by the formula;
space="preserve" listing-type="equation">RSiO.sub.1.5wherein R is selected from the group consisting of a monovalent aliphatic hydrocarbon having 1 to about 18 carbon atoms, a phenyl group, and a vinyl group and 0.1 to 99.9 parts by weight, per 100 parts by weight of said copolymer, of (b) at least one silicate group represented by the formula;
##EQU2## wherein M is a cation which forms a water-soluble silicate, d is the valence of the cation represented by M and has a value of at least 1 and e has a value of 1 to 3 andB. an effective metal corrosion inhibiting amount of an azole. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification