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Decarburized Surface

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Crevice Corrosion in a Subsea System — Aspect Before Analysis

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TryML00074 corrosion ML00009 brittle fracture ductile behavior fatigue hydrogen fracture embrittlement stress corrosion

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Microstructure73

Austenite38 cases
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Condition60

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Material61

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Atlas / Detail focus / Microstructure / Decarburized Surface

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Micrographic detail of spring surface, showing the pits full of corrosion deposits and a small decarburized layer (probably from the manufacturing processes).

30

ML00172 / Mar.2021

Brittle Fracture of a LAS Valve Spring

M - Low Alloy Medium Carbon QTP - SpringAp - Oil and GasCd - Brittle Fracture

Cm - Nital Etched Micrography by OMDf - Decarburized Surface

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