Raw Material

109 cases · 908 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Capture method: Optical Microscope clear all

Raw Material — sub-branches

Bar 5Carburized 1Casting 16Chromium Plated 2Cold Formed 2Forged T 1Forging 12Heat Treated Part 4Machined Part 10Pipe 20Plate 1Rod 1Rolled Bar 2Rolled Plate 19Rolled Shape 1Sheet 1Tube 17Tubular Forging 6Welded Part 1Wire 3Wrought Fitting 3

Results

SortNewestOldestTitle A-ZTitle Z-A
Micrography of a section transverse to the Oxygen Plasma Cut surface, showing the zone affected by the heat generated in the cutting. The extension of the HAZ is about 0.5 mm. The cut was conducted in the 1 1/4" thickness of the plate.
359
VIEW
ML00033 / Jan.2017
Plasma Cut of 1 1/4" Steel Plate
M - High Strength Low AlloyP - Rolled PlateAp - StructureCd - Cutting
Cm - Nital Etched Micrography by OMDf - Heat Affected Zone
Grey cast iron microstructe. Perlitic matrix and graphite flakes.
508
VIEW
ML00032 / Jan.2017
Cast Iron Case of Drilling Equipment
M - Gray Cast ironP - CastAp - O&G Well DrillingCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Pearlite Matrix
The microstructure of the pipe base metal, in the center of the thickness, is granular alpha.
102
VIEW
ML00005 / Apr.2017
Environmental Hydrogen Damage in Ti Pipe
M - Unalloyed TitaniumP - Longitudinal Seam Welded PipeAp - PipingCd - Hydride Formation
Cm - Kroll Etched Micrography by OMDf - Granular structure
Ferritic-perlitic microstructure of a longitudinal section of the plate that was qualified to be adopted in a tubesheet boiler. Hot formed plate presenting perlite banding.
659
VIEW
ML00031 / Jan.2017
Carbon Steel Tubesheet for Boiler
M - Low Carbon SteelP - Rolled PlateAp - ShipCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Ferrite and Pearlite
Longitudinal section of the fitting in the center of the thickness (2"). Refined ferritic structure.
370
VIEW
ML00030 / Jan.2017
Forging for High Pressure Application
M - Microalloyed SteelP - Machined PartAp - Oil and GasCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Bainitic Ferrite
Micrographic detail of the defect (void in the right side of the figure), as polished. In the left side it is the surface of the water blade and there are some non metalic inclusions in this region.
54
VIEW
ML00017 / Apr.2017
Casting Defect in CA6NM
M - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Casting Defect
Cm - Micrography by OMDf - Void
Transverse section of the fitting that suffered a longitudinal cracking. As polished. The wrought fitting has suffered intergranular stress corrosion cracking from the internal surface, exposed to hot caustic environment.
566
VIEW
ML00011 / Oct.2017
Intergranular SCC of Pure Nickel
M - Unalloyed NickelP - Wrought FittingAp - Chemical IndustryCd - Stress Corrosion
Cm - Micrography by OMDf - Intergranular Cracking
The plate longitudinal section presents a granular refined structure. Biphasic.
340
VIEW
ML00029 / Jan.2017
Titanium Plate for Subsea Application
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Typical manufacturing
Cm - Micrography by OM, HF + HNO3 + H2O etchDf - Grain refined structure

More from these cases

ML00033 — Plasma Cut of 1 1/4" Steel PlateM - High Strength Low AlloyP - Rolled PlateAp - StructureCd - Cutting
Ferritic perlitic structure of the plate. Longitudinal section.
28
VIEW
ML00033 / Jan.2017
Plasma Cut of 1 1/4" Steel Plate
M - High Strength Low AlloyP - Rolled PlateAp - StructureCd - Cutting
Cm - Nital Etched Micrography by OMDf - Ferrite and Pearlite
Ferritic perlitic structure of the plate. Longitudinal section.
29
VIEW
ML00033 / Jan.2017
Plasma Cut of 1 1/4" Steel Plate
M - High Strength Low AlloyP - Rolled PlateAp - StructureCd - Cutting
Cm - Nital Etched Micrography by OMDf - Ferrite and Pearlite
Martensitic structure at the cutting HAZ. Longitudinal section.
29
VIEW
ML00033 / Jan.2017
Plasma Cut of 1 1/4" Steel Plate
M - High Strength Low AlloyP - Rolled PlateAp - StructureCd - Cutting
Cm - Nital Etched Micrography by OMDf - Martensite
Martensitic structure at the cutting HAZ. Longitudinal section.
29
VIEW
ML00033 / Jan.2017
Plasma Cut of 1 1/4" Steel Plate
M - High Strength Low AlloyP - Rolled PlateAp - StructureCd - Cutting
Cm - Nital Etched Micrography by OMDf - Martensite
Intercritical heating at 0.5 mm from the cut surface, showing martensitic islands.
32
VIEW
ML00033 / Jan.2017
Plasma Cut of 1 1/4" Steel Plate
M - High Strength Low AlloyP - Rolled PlateAp - StructureCd - Cutting
Cm - Nital Etched Micrography by OMDf - Heat Affected Zone

+2 more from this case →

ML00032 — Cast Iron Case of Drilling EquipmentM - Gray Cast ironP - CastAp - O&G Well DrillingCd - Typical manufacturing
Low magnification micrography presenting the grapjite morphology.
138
VIEW
ML00032 / Jan.2017
Cast Iron Case of Drilling Equipment
M - Gray Cast ironP - CastAp - O&G Well DrillingCd - Typical manufacturing
Cm - Micrography by OMDf - Graphite Type A (ASTM A247)
Grey cast iron structure. As polished.
111
VIEW
ML00032 / Jan.2017
Cast Iron Case of Drilling Equipment
M - Gray Cast ironP - CastAp - O&G Well DrillingCd - Typical manufacturing
Cm - Micrography by OMDf - Graphite in Flakes
Grey cast iron with graphite in flakes.
98
VIEW
ML00032 / Jan.2017
Cast Iron Case of Drilling Equipment
M - Gray Cast ironP - CastAp - O&G Well DrillingCd - Typical manufacturing
Cm - Micrography by OMDf - Graphite in Flakes
Grey cast iron with graphite in flakes and perlitic matrix.
110
VIEW
ML00032 / Jan.2017
Cast Iron Case of Drilling Equipment
M - Gray Cast ironP - CastAp - O&G Well DrillingCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Perlite Matrix
Grey cast iron microstructe. Perlitic matrix and graphite flakes.
85
VIEW
ML00032 / Jan.2017
Cast Iron Case of Drilling Equipment
M - Gray Cast ironP - CastAp - O&G Well DrillingCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Graphite Type A (ASTM A247)

+1 more from this case →

ML00005 — Environmental Hydrogen Damage in Ti PipeM - Unalloyed TitaniumP - Longitudinal Seam Welded PipeAp - PipingCd - Hydride Formation
The pipe base metal, at the internal surface, presents a hydride layer showing that the environment is absorbing hydrogen. Although there are microcracks in this layer it did not detach in the base metal.
102
VIEW
ML00005 / Apr.2017
Environmental Hydrogen Damage in Ti Pipe
M - Unalloyed TitaniumP - Longitudinal Seam Welded PipeAp - PipingCd - Hydride Formation
Cm - Kroll Etched Micrography by OMDf - Hydride Formation
The microstructure of the pipe seam weld metal, in the center of the thickness, presents a coarse prior beta grain size.
85
VIEW
ML00005 / Apr.2017
Environmental Hydrogen Damage in Ti Pipe
M - Unalloyed TitaniumP - Longitudinal Seam Welded PipeAp - PipingCd - Hydride Formation
Cm - Kroll Etched Micrography by OMDf - Columnar Grains
The pipe internal suface, at the welded region, presents no hydride layer (because it has detached) as well as the material itself is suffering brittle detachment.
71
VIEW
ML00005 / Apr.2017
Environmental Hydrogen Damage in Ti Pipe
M - Unalloyed TitaniumP - Longitudinal Seam Welded PipeAp - PipingCd - Hydride Formation
Cm - Kroll Etched Micrography by OMDf - Localized Thinning
Detail, as polished, of brittle cracks in the weld metal, from the internal side of the pipe.
67
VIEW
ML00005 / Apr.2017
Environmental Hydrogen Damage in Ti Pipe
M - Unalloyed TitaniumP - Longitudinal Seam Welded PipeAp - PipingCd - Hydride Formation
Cm - Micrography by OMDf - Brittle Cracks
Seam weld of the pipe showing the localized thinning in the weld metal, caused by the detachment of the hydride layer and brittle behaviour of the coarse weld metal structure.
64
VIEW
ML00005 / Apr.2017
Environmental Hydrogen Damage in Ti Pipe
M - Unalloyed TitaniumP - Longitudinal Seam Welded PipeAp - PipingCd - Hydride Formation
Cm - Kroll Etched Micrography by OMDf - Localized Thinning
ML00031 — Carbon Steel Tubesheet for BoilerM - Low Carbon SteelP - Rolled PlateAp - ShipCd - Typical manufacturing
Ferritic-perlitic microstructure of a longitudinal section of the plate that was qualified to be adopted in a tubesheet boiler. Hot formed plate presenting perlite banding.
213
VIEW
ML00031 / Jan.2017
Carbon Steel Tubesheet for Boiler
M - Low Carbon SteelP - Rolled PlateAp - ShipCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Ferrite and Pearlite
Ferritic-perlitic microstructure of a longitudinal section of the plate that was qualified to be adopted in a tubesheet boiler. Hot formed plate presenting perlite banding.
173
VIEW
ML00031 / Jan.2017
Carbon Steel Tubesheet for Boiler
M - Low Carbon SteelP - Rolled PlateAp - ShipCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Banded Pearlite
ML00030 — Forging for High Pressure ApplicationM - Microalloyed SteelP - Machined PartAp - Oil and GasCd - Typical manufacturing
Longitudinal section of the fitting in the center of the thickness (2"). Refined ferritic structure.
67
VIEW
ML00030 / Jan.2017
Forging for High Pressure Application
M - Microalloyed SteelP - Machined PartAp - Oil and GasCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Grain refined structure
Longitudinal section of the fitting in the center of the thickness (2"). Refined ferritic structure.
63
VIEW
ML00030 / Jan.2017
Forging for High Pressure Application
M - Microalloyed SteelP - Machined PartAp - Oil and GasCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Grain refined structure
ML00017 — Casting Defect in CA6NMM - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Casting Defect
Micrographic detail non metalic inclusions in the region where there are casting defects. As polished.
48
VIEW
ML00017 / Apr.2017
Casting Defect in CA6NM
M - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Casting Defect
Cm - Micrography by OMDf - Non Metallic Inclusions
Blade microstructure. Tempered martensite, (probably) retained austenite and delta ferrite islands.
55
VIEW
ML00017 / Apr.2017
Casting Defect in CA6NM
M - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Casting Defect
Cm - Kalling Etched Micrography by OMDf - Delta Ferrite Islands
Blade microstructure. Previous austenite coarse grains.
47
VIEW
ML00017 / Apr.2017
Casting Defect in CA6NM
M - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Casting Defect
Cm - Kalling Etched Micrography by OMDf - Coarse Structure
Blade microstructure. Tempered martensite, (probably) retained austenite and delta ferrite islands.
48
VIEW
ML00017 / Apr.2017
Casting Defect in CA6NM
M - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Casting Defect
Cm - Kalling Etched Micrography by OMDf - Delta Ferrite Islands
Region of a casting void in the blade.
34
VIEW
ML00017 / Apr.2017
Casting Defect in CA6NM
M - Martensitic Stainless SteelP - Machined PartAp - EnergyCd - Casting Defect
Cm - Kalling Etched Micrography by OMDf - Void

+1 more from this case →

ML00011 — Intergranular SCC of Pure NickelM - Unalloyed NickelP - Wrought FittingAp - Chemical IndustryCd - Stress Corrosion
Microstructure of the fitting in the transverse section, presenting a granular Ni austenitic structure. No evidences of any phase in the grain boundaries.
114
VIEW
ML00011 / Oct.2017
Intergranular SCC of Pure Nickel
M - Unalloyed NickelP - Wrought FittingAp - Chemical IndustryCd - Stress Corrosion
Cm - Kalling Etched Micrography by OMDf - Austenite
Microstructure of the fitting in the transverse section, presenting a granular Ni austenitic structure. No evidences of any phase in the grain boundaries.
110
VIEW
ML00011 / Oct.2017
Intergranular SCC of Pure Nickel
M - Unalloyed NickelP - Wrought FittingAp - Chemical IndustryCd - Stress Corrosion
Cm - Kalling Etched Micrography by OMDf - Austenite
Microstructure of the fitting in the transverse section, presenting a granular Ni austenitic structure. No evidences of any phase in the grain boundaries.
96
VIEW
ML00011 / Oct.2017
Intergranular SCC of Pure Nickel
M - Unalloyed NickelP - Wrought FittingAp - Chemical IndustryCd - Stress Corrosion
Cm - Kalling Etched Micrography by OMDf - Austenite
Transverse section of the fitting that suffered a longitudinal cracking. As polished. The wrought fitting has suffered intergranular stress corrosion cracking from the internal surface, exposed to hot caustic environment.
70
VIEW
ML00011 / Oct.2017
Intergranular SCC of Pure Nickel
M - Unalloyed NickelP - Wrought FittingAp - Chemical IndustryCd - Stress Corrosion
Cm - Micrography by OMDf - Intergranular Cracking
Transverse section of the fitting that suffered a longitudinal cracking. As polished. The wrought fitting has suffered intergranular stress corrosion cracking from the internal surface, exposed to hot caustic environment.
59
VIEW
ML00011 / Oct.2017
Intergranular SCC of Pure Nickel
M - Unalloyed NickelP - Wrought FittingAp - Chemical IndustryCd - Stress Corrosion
Cm - Micrography by OMDf - Corrosion Cracking

+2 more from this case →

ML00029 — Titanium Plate for Subsea ApplicationM - Ti6Al4VP - Rolled PlateAp - StructureCd - Typical manufacturing
Alpha and beta phases. Refined Structure.
52
VIEW
ML00029 / Jan.2017
Titanium Plate for Subsea Application
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Typical manufacturing
Cm - Micrography by OM, HF + HNO3 + H2O etchDf - Two phases
Alpha and beta phases. Refined Structure.
46
VIEW
ML00029 / Jan.2017
Titanium Plate for Subsea Application
M - Ti6Al4VP - Rolled PlateAp - StructureCd - Typical manufacturing
Cm - Micrography by OM, HF + HNO3 + H2O etchDf - Two phases