THE INFLUENCE OF OPERATIONAL PARAMETERS ON THE ELECTROCHEMICAL CURRENT NOISE AND SURFACE DAMAGE OF STAINLESS STEEL EXPOSED TO AQUEOUS SODIUM CHLORIDE SOLUTIONS

摘要

Electrochemical noise experiments were run with the 316 L stainless steel (UNS 31603) using the technique of experimental design. The purpose was to determine the influence of operational parameters (NaCl content, connection delay, length of exposure, and sampling frequency) on the electrochemical response (RMS current and maximum absolute current) and on the surface response (pit density and maximum depth of the pits). The runs determined: 1) The maximum depth shows a random behavior, 2) the pit density depends on the NaCl content, 3) The root-mean-square (RMS) current was dependent on all four factors; and 4) The maximum absolute current was dependent on all factors, including two-factor interactions.