Proposed stability product criterion for open hemispherical metastable pits formed in the crevices of different aspect ratios (l/d) on 316L stainless steel in 3.5% NaCl solution
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Abstract
Abstract This work investigates the mechanism of crevice corrosion for a 316 L stainless steel in 3.5 % NaCl solution and assesses its characteristics. Potentiodynamic, potentiostatic, and galvanostatic techniques along with SEM were used to characterize the crevice corrosion at various gap sizes of 5, 10, 30, 60, 120 and 240 μm. Results revealed that the crevice corrosion initiates by pitting events stabilization. Using a novel approach and considering the crevice aspect ratio (l/d), it is discussed how the crevice geometry can affect pit stability product criterion. By increasing the crevice gap, the pit stability product decreased and the induction time increased.
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Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Corrosion Behavior and Inhibition · Concrete Corrosion and Durability
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