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Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Zinc Layer Capture method: Nital Etched Micrography by OM Detail focus: Cracking clear all

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Micrography of the branch cracking parallel to the fracture. There are several secondary intergranular cracks and the cracks are filled with zinc. The zinc appears dark because of the Nital etch, and the steel is not fully revealed because of the protection by the zinc.
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ML00138 / Jun.2018
Liquid Metal Embrittlement of a HSLA Steel
M - High Strength Low AlloyP - Coated ProductAp - Mechanical IndustryCd - Liquid Metal Embrittlement
Cm - Nital Etched Micrography by OMDf - Cracking