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Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Zinc Layer Capture method: Optical Microscope Detail focus: Fracture clear all

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Micrography of the section transverse to the fracture (top of the figure). The fracture is intergranular, there are several secondary cracks, and there are deposits of zinc over the fracture. The zinc makes difficult the etch with Nital to reveal the microstructure close to the fracture surface.

67

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 - Fracture