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2 cases · 5 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Standard: 193 Capture method: Scanning Electron Microscope clear all

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Low magnification SEM image showing the brittle aspect of the cracks in the bolt thread.
61
VIEW
ML00157 / Feb.2020
Bolts Under Chloride SCC Conditions
M - Austenitic Stainless SteelP - BoltAp - Oil and GasCd - Stress Corrosion
Cm - Surface Aspect by SEMDf - Brittle Cracks
Fractographic aspect of the stud fracture surface, by scanning electron microscopy, close to the bottom of the thread fillet. In the center of the image it is possible to see secondary cracks with intergranular morphology.
59
VIEW
ML00136 / Jun.2018
Hydrogen Cracks of Subsea Studs
M - Low Alloy Medium Carbon QTP - FastenerAp - SubseaCd - Hydrogen Embrittlement
Cm - Fractography by SEMDf - Brittle Fracture

More from these cases

ML00157 — Bolts Under Chloride SCC ConditionsM - Austenitic Stainless SteelP - BoltAp - Oil and GasCd - Stress Corrosion
Detail of the bolt thread in a SEM image, showing parts of the thread removed in a brittle way.
62
VIEW
ML00157 / Feb.2020
Bolts Under Chloride SCC Conditions
M - Austenitic Stainless SteelP - BoltAp - Oil and GasCd - Stress Corrosion
Cm - Surface Aspect by SEMDf - Brittle Fracture
ML00136 — Hydrogen Cracks of Subsea StudsM - Low Alloy Medium Carbon QTP - FastenerAp - SubseaCd - Hydrogen Embrittlement
Fractographic detail by scanning electron microscopy of the secondary cracks with intergranular morphology.
47
VIEW
ML00136 / Jun.2018
Hydrogen Cracks of Subsea Studs
M - Low Alloy Medium Carbon QTP - FastenerAp - SubseaCd - Hydrogen Embrittlement
Cm - Fractography by SEMDf - Secondary Cracks
Micrography of the bottom of the thread fillet, presenting secondary cracks of intergranular morphology, propagating transverse to the stud axis, but presenting longitudinal openings.
28
VIEW
ML00136 / Jun.2018
Hydrogen Cracks of Subsea Studs
M - Low Alloy Medium Carbon QTP - FastenerAp - SubseaCd - Hydrogen Embrittlement
Cm - Nital Etched Micrography by SEMDf - Cracks