The Effect of Salt Loading on Chloride-Induced Stress Corrosion Cracking of 304L Austenitic Stainless Steel Under Atmospheric Conditions
21 Pages Posted: 27 Aug 2019 Publication Status: Accepted
Abstract
The effect of salt loading on chloride-induced stress corrosion cracking in 304L was studied at atmospheric pressure. Stress relieved samples were uniaxially pre-strained to 5% and were loaded with nine levels of MgCl2 from 2.3 x 10-4 to 4.2 x 10-2 g.cm-2. Samples were subject to 60 MPa stress, 90°C at 70% relative humidity, for 480 hours. A direct correlation between salt loading and the density of cracking and corrosion was observed between 7.6 x 10-4 and 2.6 x 10-2 g.cm-2 . Crack propagation rates were constant between salt loadings of 7.6 x 10-4 and 3.2 x 10-2 g.cm-2 at 1-2 µm.hr-1.
Keywords: Austenitic stainless steels, Corrosion, Stress-corrosion cracking, Chlorides
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