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Crevice Corrosion in a Subsea System — Aspect Before Analysis

Detail focus: Intergranular Cracking clear all

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Micrography close to the external surface (to the top). The layer of intergranular corrosion shows evidences of selective leaching (suggesting that the aluminum was preferentially consumed). The stress corrosion cracking starts from the intergranularly corroded layer.
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ML00165 / Jul.2020
SCC of Aluminum Bronze Heating Coil
M - Aluminum BronzeP - Seamless tubeAp - Oil and GasCd - Stress Corrosion
Cm - FeCl3+HCl+H2O Etched MicroDf - Intergranular Cracking