Corrosion

1 case · 2 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Capture method: Aspect After Cleaning clear all

Corrosion — sub-branches

Brittle Behavior 7Corrosion Fatigue 7Crevice 1Erosion Corrosion 1General Corrosion 1Intergranular Corrosion 3Localized Dissolution 2Pitting Corrosion 4Preferential Dissolution 4Stress Corrosion 9

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The painting of the valve body was detaching at the vent location where the fitting was installed, not fully tighted. Three threaded fillets were outside of the body.
190
VIEW
ML00184 / Apr.2023
Dissimilar Steels in a Threaded Connection
M - Low Carbon SteelP - ForgingAp - OffshoreCd - Localized Dissolution
Cm - Aspect After CleaningDf - Painting Detachment

More from these cases

ML00184 — Dissimilar Steels in a Threaded ConnectionM - Low Carbon SteelP - ForgingAp - OffshoreCd - Localized Dissolution
The cleaned fitting is sound. No corrosion, only surface stains.
121
VIEW
ML00184 / Apr.2023
Dissimilar Steels in a Threaded Connection
M - Low Carbon SteelP - ForgingAp - OffshoreCd - Localized Dissolution
Cm - Aspect After CleaningDf - General View