Microstructure

1 case · 10 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Application: Structure Condition: Corrosion Capture method: Optical Microscope clear all

Microstructure — sub-branches

Acicular Alpha 1 Austenite 1 Bainite 1 Bainitic HAZ 2 Bainitic Martensitic 1 Banded Pearlite 1 Clad Interface 1 Coarse Structure 1 Predominantly Pearlitic 1

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Higher magnification detail of the predominantly pearlitic microstructure of the wire.

88

ML00155 / Jan.2020

Failure of a Prestressed Concrete Steel Strand

M - High Carbon SteelP - Wire RopeAp - StructureCd - Corrosion Fatigue

Cm - Nital Etched Micrography by OMDf - Predominantly Pearlitic

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ML00155 — Failure of a Prestressed Concrete Steel StrandM - High Carbon SteelP - Wire RopeAp - StructureCd - Corrosion Fatigue

3

ML00155 / Jan.2020

Failure of a Prestressed Concrete Steel Strand

M - High Carbon SteelP - Wire RopeAp - StructureCd - Corrosion Fatigue

Cm - Chromic Acid Electrolytic EtchedDf - Acicular Alpha

4

ML00155 / Jan.2020

Failure of a Prestressed Concrete Steel Strand

M - High Carbon SteelP - Wire RopeAp - StructureCd - Corrosion Fatigue

Cm - FeCl3+HCl+H2O Etched MicroDf - Bainite

3

ML00155 / Jan.2020

Failure of a Prestressed Concrete Steel Strand

M - High Carbon SteelP - Wire RopeAp - StructureCd - Corrosion Fatigue

Cm - As polished micrographyDf - Austenite

3

ML00155 / Jan.2020

Failure of a Prestressed Concrete Steel Strand

M - High Carbon SteelP - Wire RopeAp - StructureCd - Corrosion Fatigue

Cm - Eletrolytically Etched Micrography by OMDf - Banded Pearlite

3

ML00155 / Jan.2020

Failure of a Prestressed Concrete Steel Strand

M - High Carbon SteelP - Wire RopeAp - StructureCd - Corrosion Fatigue

Cm - Glyceregia Etched Micrography by OMDf - Bainitic Martensitic

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