A novel approach for performing electrochemical testing on in-situ stainless steel surfaces is presented. This approach involves the use of an absorbent pad placed on the test surface to facilitate the application of standard electrochemical test methods. A detailed description of the experimental procedure is provided. The test method has the advantages of being nondestructive and can be used as a field test. Examples of the successful use of this approach for the in-situ evaluating the pitting resistance of 316L pharmaceutical tanks and for nondestructive detection of sigma phase in cast duplex stainless steel are provided. Other possible applications and limitations of the test method are discussed.

Subject
Sigma phase, Electric current, Test methods, Steel surfaces, Electrochemical cells, Electrochemical testing, Current measurements, Pitting, Case studies, Duplex stainless steel, Stainless steel, Casting, Samples
Keywords:
In-situ testing, electrochemical testing, stainless steel, pitting resistance, sigma phase
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2021
Association for Materials Protection and Performance (AMPP)
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