Damage

2 cases · 4 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Standard: 410 Capture method: Aspect Before Analysis clear all

Damage — sub-branches

Brittle Behavior 1Corrosion 1

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Aspect of the inner side of a valve body, showing regions of localized corrosion and rust, not expected for this stainless steel.
82
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ML00092 / Sep.2017
MIC of a Valve Body
M - Martensitic Stainless SteelP - Valve BodyAp - Oil and GasCd - Brittle Behavior
Cm - Aspect Before AnalysisDf - Corrosion
Aspect of the broken shear pin that was manufactured in a martensitic stainless steel forged bar, machined with the external diameter of 50mm, the internal diameter of 20mm and the shearing diameter of 25mm (shearing thickness 2.5mm). The fracture, in the right side of the figure, is not fully flat as should be expected for a shearing mechanism.
55
VIEW
ML00046 / Jan.2018
Brittle Fracture of SS Shear Pin
M - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Intergranular Cracking
Cm - Aspect Before AnalysisDf - General View

More from these cases

ML00092 — MIC of a Valve BodyM - Martensitic Stainless SteelP - Valve BodyAp - Oil and GasCd - Brittle Behavior
Evidences of a stagnated fluid in the internal surface of the valve body.
61
VIEW
ML00092 / Sep.2017
MIC of a Valve Body
M - Martensitic Stainless SteelP - Valve BodyAp - Oil and GasCd - Brittle Behavior
Cm - Aspect Before AnalysisDf - Internal Surface
Deep localized corrosion spots, rusted. There are indications that the roughness of the surface influences the localized corrosion location.
61
VIEW
ML00092 / Sep.2017
MIC of a Valve Body
M - Martensitic Stainless SteelP - Valve BodyAp - Oil and GasCd - Brittle Behavior
Cm - Aspect Before AnalysisDf - Localized Corrosion