A service test of five years’ duration was carried out on a borax-based corrosioninhibitor mixture consisting of borax, mercaptobenzothiazole, silicate and lime. The inhibitor was used in alternately winter and summer coolants in the engine of a petrol driven motor vehicle which covered a distance of about 48,000 miles during the test. The results showed that all metals of the cooling system of the vehicle's engine were very well protected against corrosion.
The inhibitor also afforded an exceptionally good protection to rubber hoses, its effective action against oxidative degradation of rubber being attributable to its capacity for removal of copper ions from solution.
Get full access to this article
View all access options for this article.
References
1.
KellerE. H., U.S. P. 2, 373, 570
2.
KifferA. D., U.S. P. 2, 384, 553
3.
U.S. Federal Specification O-C-746, 1951
4.
B.P. 976,964 &976, 965
5.
U.S. P. 3, 340, 707
6.
‘1964 Book of A.S.T.M. Standards’, Part 22, p. 245 (Phila-delphia: American Society for Testing and Materials)
7.
SquiresA. T B. P.., ‘Corrosion inhibitors for ethylene glycol water coolants for piston engines’, T.S.D. Publication549[undated]
8.
DulatJ., Proc. Second International Congress on Metallic Corrosion, 1966, p. 597, N.A.C.E., Houston, Texas
9.
B.S. 3926 :1965
10.
KirkR. E., & OthmerD. F., ‘Encyclopaedia of chemical technology’, 1953, Vol. 11, pp. 881and 886 (New York: Inter-science Encyclopaedia Inc.)
