Determination of susceptibility to intergranular corrosion and electrochemical reactivation behaviour of AISI 316L type stainless steel

Date

2006-11-01

Author

Aydogdu, G. H.
Aydınol, Mehmet Kadri

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In this study, double loop electrochemical potentiokinetic reactivation (DLEPR) test was applied to determine the degree of sensitization in 316L type stainless steel, where obtained results were correlated with revealed microstructures after oxalic acid test and weight loss measurements of Streicher and Huey acid tests. Best agreement was provided with test parameters which are 1 M H2SO4 and 0.005 M KSCN at 0.833 mV/s scan rate at 30 degrees C. Specimens were classified structurally as absence of chromium carbides - step, no single grain completely surrounded by carbides - dual and one or more grain completely surrounded by carbides - ditch, in the as-etched structure, if the I-r:I-a (x100) ratios were obtained to be between 0 and 0.2, 0.2 and 5.0 and 5.0 and higher, respectively. It was also found that at high KSCN concentrations, reactivation current profile skewed to higher potentials where this was attributed the formation of metastable pits, during the anodic scan of the test procedure.

Subject Keywords

AISI 316L austenitic stainless steel, DLEPR test, Intergranular corrosion

URI

https://hdl.handle.net/11511/40969

Journal

CORROSION SCIENCE

DOI

https://doi.org/10.1016/j.corsci.2006.01.003

Collections

Department of Metallurgical and Materials Engineering, Article

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Citation Formats

G. H. Aydogdu and M. K. Aydınol, “Determination of susceptibility to intergranular corrosion and electrochemical reactivation behaviour of AISI 316L type stainless steel,” CORROSION SCIENCE, pp. 3565–3583, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40969.