Testing a material's corrosion response to a seawater environment at temperatures up to
200°F (93.3°C) with hypochlorite additions up to 10 ppm (part per million by volume) must be
done carefully or the results will not be accurate. Hypochlorite thermally degrades rapidly,
essentially removing it from the testing solution during the test, invalidating the results. Using
potentiodynamic scans and corrosion potential measurements, it is possible to overcome the
problem of hypochlorite degradation and determine the pitting and crevice corrosion
susceptibility of a material. This paper examines the method and provides examples of its use
with several passive metals (UNS N10276, S31603, S31254, and R50400).