Synergistic effect of crevice corrosion and galvanic coupling on 304SS fasteners degradation in chloride environments

Abstract The synergistic effect of crevice corrosion and galvanic coupling on the degradation 304 stainless steel fasteners exposed to a chloride environment was investigated using electrochemical surface analysis techniques. Results obtained revealed that region fastener showed lower resistance due decreased passivation induced by geometry low oxygen conditions, while with higher supply exhibited improved resistance. Coupling regions demonstrated accelerated attributable effect. driving force for linked three (3) key factors: (I) potential difference established between different uneven distribution, (II) in solution environment, (III) properties (active-passive surface). Morphological studies localised occurring mainly crevice.