Pitting mechanism of mild steel in marginally sour environments—Part I: A parametric study based on formation of protective layers
Source abstract
Abstract
Abstract A parametric study defined a window of conditions leading to pitting of mild steel in marginally sour environments: temperatures between 30°C and 60°C, pH2S from 0.02 mbar to 0.15 mbar, bulk pH below 6, and sodium chloride concentrations between 1 and 10 wt. %. A 100∼300 nm porous layer containing both mackinawite and magnetite was observed by transmission electron microscopy. Pitting initiated when the mackinawite layer was broken-down and exposed the steel surface to highly corrosive H2CO3. Pitting propagated due to the galvanic coupling between the exposed steel surface and the rest surface area covered by the conductive mackinawite.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Hydrogen embrittlement and corrosion behaviors in metals · Concrete Corrosion and Durability
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (48)
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