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Abstract
Evidence on the role of corrosion generated hydrogen in stress corrosion cracking of austenitic stainless steel in marine atmospheric environment is provided. The formation of corrosive solution film on the surface of steel was observed. Hydrogen permeation through the stainless steel membrane was measured. Slow strain rate tests showed that anodic and cathodic polarisations around the free corrosion potential can both increase the elongation. Thermal desorption spectroscopy measurement showed hydrogen concentration increase under cathodic potentials. The hydrogen concentration increase under deformation conditions was also confirmed. However, hydrogen accumulation at the tip of the prenotched specimens was not detected.
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