Abstract
The pitting corrosion resistance of three corrosion resistant steels, Alloy 1210, 3CR12, and Alloy 825, has been determined in synthetic mine waters containing chloride, sulphate, and nitrate ions atpH 6·2. It has been shown that the pitting resistance of these alloys improves with increasing sulphate concentration in chloride solution containing 500 ppm nitrate, and also with increasing chromium content. The practical significance of these results is demonstrated by means of experimentally determined E–pH diagrams.
It is concluded that, while pitting in individual alloys can be avoided by close control of mine water composition, this may be difficult to achieve in practice because of the complexity of the total system.
Get full access to this article
View all access options for this article.