Abstract
As corrosion rates cannot be deduced from chemical analyses of waters it is necessary to have a quick, cheap test available. This article shows how an artificial corrosion pit can be used as the basis of a test. Two forms of artificial pit are described: the chemically-stimulated and electrically-stimulated types. It is shown that the latter is more suitable for predicting corrosion rates, but the former is shown to have many uses in laboratory work, particularly in studies of cathodic protection.
The electrically-stimulated pit predicts pitting rates in one week, compared with three months for an immersion test. Also, this test is cheaper to perform and uses a smaller water sample.
Constructional details and standard dimensions of the two pit designs used by the author are given in an appendix.
