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Title: Soils And Underground Corrosion
Author: E. Escalante
Source: American Gas Association 1980
Year Published: 1980
Abstract: The evaluation of soil corrosivity is of concern not only to public and private utilities, but to anyone faced with the placement of metallic structures, generally steel, in the ground. The soil variables are many, including temperature, chemical composition, resistivity, texture, topography, microbial activity, etc. The effect of these variables on observed corrosion was investigated by a number of people (references 1-15). Significant contributions, particularly in the method for determining ground resistivity, were made before 1940 (references 18-22). The development of the Wenner bridge (four-pin method) in 1916 is an example (reference 21). In an effort to evaluate the various methods used for establishing the aggressiveness of soil, the National Bureau of Standards (NBS) has engaged in characterizing its seven underground test sites. The following soil parameters were measured al each site: resistivity, pH, redox potential and soluble salts. These data are compared to observed corrosion of long term burial tests at these locations, The measurement techniques used, the observations made, and the resulting data are described.

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