A laboratory method, based upon colorimetric analysis, is described for finding the minimum current density required to cathodically protect steel against corrosion by water containing a small amount of dissolved salts. The minimum current densities determined by this method are compared with those obtained from a Britton curve for each of the two test solutions of sodium sulfate and sodium chloride. The significance of the minimum current densities determined by these two methods is discussed.

Subject
Water, Electrochemical cells, Cathodic protection, Corrosion rate, Sodium sulfate, Sodium chloride, Corrosion testing, Potential measurements, Sodium chloride solution, Current densities, Steel, Rust, Electric potential
Copyright 1951 by the National Association of Corrosion Engineers.
1951
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