Quantitative Damage by Stray Currents

In general, the amount of metal corroding at anodic areas because of stray current can be calculated using Faraday s law. Weight losses of typical metals for the equivalent of 1A flowing for one year are listed in Table 12.1. 

At low current densities, local-action corrosion supplements stray-current corrosion. At high current densities in some environments, oxygen may be evolved, reducing the amount of metal corroding per faraday of electricity. 

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