Dissimilar conditions will tend to increase the corrosion rate in the more corrosive type soil where a pipeline traverses the dissimilar soils.rnThere are many test procedures for rating soil cor-rosivity, including redox potential tests, nipple and can tests, Denison electrolytic cell, Putman test, acidity and chemical analyses, and several using electrical resistivity. One may be quite accurate in a certain soil and only fair in another. Nevertheless, any corrosivity test is better than none, especially when considered in light of physical characteristics, and most of the tests will at least predict what portions of a pipeline route are most likely to give trouble.
展开▼
