Cracks

2 cases · 2 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Application: Ship Capture method: Optical Microscope clear all

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Micrographic detail of the dezincification effect, where the beta phase is preferentially corroded, leaving a cooper rich phase (red) that is porous and easily cracks.
130
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ML00125 / Mar.2018
Dezincification of a Cooler Tubesheet
M - BrassP - PlateAp - ShipCd - Preferential Dissolution
Cm - As polished micrographyDf - Cracks
Micrography of the section transverse to the weld, presenting one crack at the edge of the tube. This is not the best direction of analysis because the cracks are parallel to the analyzed section. It is possible to see the crack from the surface, large and filled with oxides.
78
VIEW
ML00119 / Feb.2018
Thermal Fatigue of a Marine Boiler
M - Low Carbon SteelP - Fabrication WeldAp - ShipCd - Thermal Fatigue
Cm - Nital Etched Micrography by OMDf - Cracks