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Crevice Corrosion in a Subsea System — Aspect Before Analysis

Condition: Corrosion Microstructure: Strain Hardened Capture method: Surface Aspect clear all

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Low magnification microscope image showing the aspect of the thread close to the fracture surface. Looks like a wear or strong corrosion, but in fact the threads were removed because they were cracked, as can be seen in the next figures.
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ML00157 / Feb.2020
Bolts Under Chloride SCC Conditions
M - Austenitic Stainless SteelP - BoltAp - Oil and GasCd - Stress Corrosion
Cm - Surface AspectDf - Low Mag