Corrosion in Soil
As a corrosion environment, soil differs from other natural environments, such as atmospheric environments or waters, in two major aspects. Firstly, soil has a much wider range of chemical and physical properties. For example, the pH of soil may vary from as low as 2.6 to as high as 10.2, and the resistivity from several tens of ohms to near 100 kΩ . As a result, the corrosion rate of a metal may drastically vary from soil to soil. Secondly, soil is a highly inhomogeneous environment, both microscopically (e.g., on the scale of a clay particle) and macroscopically (e.g., on the scale of a rock). Thus, the corrosion in soil is seldom uniform across the metal surface.
KeywordsCorrosion Rate Silt Loam Cathodic Protection Galvanize Steel Zinc Coating
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