Journal
CORROSION SCIENCE
Volume 51, Issue 4, Pages 876-881Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2009.01.018
Keywords
Stainless steel; Polarization; X-ray diffraction; Pitting corrosion; Welding
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Potentiodynamic measurements together with SEM were used to analyze susceptibility to pitting corrosion of 13CrNiMo plate metals. Volume fractions of austenite in tempered conditions affect pitting resistance. Characteristic potentials (critical pitting and repassivation) increase according to the retained austenite content. Results correspond to a structural refinement resulting from a double tempering procedure. A comparison is made with results from weld metal samples. The importance of this evaluation is to be able to determine pitting resistance, either in a service application, or in laboratory test programs. (C) 2009 Elsevier Ltd. All rights reserved.
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