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Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Acicular Ferrite Capture method: Optical Microscope Detail focus: External Surface clear all

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Micrography of the external tube surface, presenting a crack at the weld margin. This cracking could have been created by thermal induced cycles (fatigue), but it did not propagate into the tube wall. In some regions of the external side of the tube the weld metal was detached.
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ML00163 / Jun.2020
Corrosion Fatigue of a Boiler Waterwall Tube
M - Low Carbon SteelP - Seamless tubeAp - BoilerCd - Corrosion Fatigue
Cm - Nital Etched Micrography by OMDf - External Surface