Macro Oxalic Acid Electrolytic Etched

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Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Free from Carbides clear all

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Macrography of the longitudinal section of the stub end, showing the external side to the top and the internal side to the bottom. The stub end was manufactured by welding, longitudinal seam (not evidenced in this image) and circunferential weld of tube to disc (partial penetration). The cracks starts from the external side of the stub end.
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ML00168 / Aug.2020
SCC of Austenitic SS Flange Stub End
M - Austenitic Stainless SteelP - Stub EndAp - Chemical IndustryCd - Stress Corrosion
Cm - Macro Oxalic Acid Electrolytic EtchedDf - Longitudinal Section