Replication Technique

2 cases · 2 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Condition: Damage Detail focus: Sampling and Analysis clear all

Replication Technique — sub-branches

As polished 1Nital etched, OM 1

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Micrography of the painted external surface of the cast cylinder.
25
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ML00141 / Jul.2018
Brittle Fracture of a Corroded Gray Cast Iron
M - Gray Cast ironP - CastingAp - EngineCd - Brittle Fracture
Cm - As polishedDf - Close to the External Surface
The weld metal presented a ferritic/bainitic structure at the surface, where the replica was conducted. The weld metal hardness is 272 HB, too high for this material, suggesting lack of a suitable PWHT.
102
VIEW
ML00071 / Jan.2019
Reheating Cracking of a CrMo Vessel Weld
M - CrMo SteelP - In Field WeldAp - EnergyCd - Welding Defect
Cm - Nital etched, OMDf - Weld Metal