Optical Microscope

28 cases · 150 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Condition: Typical manufacturing clear all

Optical Microscope — sub-branches

As polished micrography 2Kalling Etched Micrography by OM 33Micro by OM, HCl + Ethanol + Picric Acid 12Micrography by OM 3Micrography by OM using A262 Method A 12Micrography by OM, HF + HNO3 + H2O etch 6Nital Etched Micrography by OM 76Oxalic Acid Electrolytic Etch 6

Results

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Longitudinal section of the wire, close to the surface. Galvanized layer (zinc), 50 microns thickness.
368
VIEW
ML00036 / Jan.2018
High Strength Medium Carbon Steel Wire
M - Medium Carbon SteelP - WireAp - OffshoreCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Surface Layer
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
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
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
The bar presented a large prior beta grain size and acicular alpha. Biphasic structure.
420
VIEW
ML00028 / Jan.2017
Titanium Bar for Subsea Application
M - Ti6Al4VP - BarAp - StructureCd - Typical manufacturing
Cm - Micrography by OM, HF + HNO3 + H2O etchDf - Coarse Structure
Transverse section of the 1/16" thick tube at the autogenous seam weld.
588
VIEW
ML00026 / Feb.2017
Autogenous Seam Welded Tube in Ferritic SS
M - Ferritic Stainless SteelP - Fabrication WeldAp - AutomotiveCd - Typical manufacturing
Cm - Kalling Etched Micrography by OMDf - Autogenous Weld
Ferritic perlitic microstructure, banded, in the center of the 5/16" thick C-Mn plate. Refined Structure.
371
VIEW
ML00021 / Dec.2017
5/16" CMn Steel Plate for Pressure Vessel
M - CMn SteelP - PlateAp - Oil and GasCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Grain refined structure

More from these cases

ML00036 — High Strength Medium Carbon Steel WireM - Medium Carbon SteelP - WireAp - OffshoreCd - Typical manufacturing
Longitudinal section of the 3.6 mm wire, presenting a refined structure.
46
VIEW
ML00036 / Jan.2018
High Strength Medium Carbon Steel Wire
M - Medium Carbon SteelP - WireAp - OffshoreCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Longitudinal Section
Longitudinal section of the 3.6 mm wire, presenting a strain hardened structure, predominantly perlitic.
41
VIEW
ML00036 / Jan.2018
High Strength Medium Carbon Steel Wire
M - Medium Carbon SteelP - WireAp - OffshoreCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Longitudinal Section
Longitudinal section of the 3.6 mm wire, presenting a strain hardened structure, predominantly perlitic.
38
VIEW
ML00036 / Jan.2018
High Strength Medium Carbon Steel Wire
M - Medium Carbon SteelP - WireAp - OffshoreCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Predominantly Pearlitic
Transverse section of the 3.6 mm wire, presenting a refined structure.
32
VIEW
ML00036 / Jan.2018
High Strength Medium Carbon Steel Wire
M - Medium Carbon SteelP - WireAp - OffshoreCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Transverse Section
Transverse section of the 3.6 mm wire, presenting a refined structure predominatly perlitic.
19
VIEW
ML00036 / Jan.2018
High Strength Medium Carbon Steel Wire
M - Medium Carbon SteelP - WireAp - OffshoreCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Transverse Section

+1 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.
110
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.
97
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 →

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.
66
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
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
ML00028 — Titanium Bar for Subsea ApplicationM - Ti6Al4VP - BarAp - StructureCd - Typical manufacturing
The bar presented alpha plus beta phases, acicular alpha and coarse prior beta grains.
97
VIEW
ML00028 / Jan.2017
Titanium Bar for Subsea Application
M - Ti6Al4VP - BarAp - StructureCd - Typical manufacturing
Cm - Micrography by OM, HF + HNO3 + H2O etchDf - Two phases
Acicular alpha structure in a biphasic alloy of a large prior beta grain size. 4" diameter bar.
100
VIEW
ML00028 / Jan.2017
Titanium Bar for Subsea Application
M - Ti6Al4VP - BarAp - StructureCd - Typical manufacturing
Cm - Micrography by OM, HF + HNO3 + H2O etchDf - Acicular Alpha
ML00026 — Autogenous Seam Welded Tube in Ferritic SSM - Ferritic Stainless SteelP - Fabrication WeldAp - AutomotiveCd - Typical manufacturing
Equiaxial grains of a ferritic structure, in a longitudinal section of the tube.
97
VIEW
ML00026 / Feb.2017
Autogenous Seam Welded Tube in Ferritic SS
M - Ferritic Stainless SteelP - Fabrication WeldAp - AutomotiveCd - Typical manufacturing
Cm - Kalling Etched Micrography by OMDf - Longitudinal Section
Equiaxial grains of a ferritic structure, in a longitudinal section of the tube.
68
VIEW
ML00026 / Feb.2017
Autogenous Seam Welded Tube in Ferritic SS
M - Ferritic Stainless SteelP - Fabrication WeldAp - AutomotiveCd - Typical manufacturing
Cm - Kalling Etched Micrography by OMDf - Equiaxial Grains
Equiaxial grains of a ferritic structure, in a longitudinal section of the tube.
49
VIEW
ML00026 / Feb.2017
Autogenous Seam Welded Tube in Ferritic SS
M - Ferritic Stainless SteelP - Fabrication WeldAp - AutomotiveCd - Typical manufacturing
Cm - Kalling Etched Micrography by OMDf - Ferrite
Equiaxial grains of a ferritic structure, in a transverse section of the tube.
40
VIEW
ML00026 / Feb.2017
Autogenous Seam Welded Tube in Ferritic SS
M - Ferritic Stainless SteelP - Fabrication WeldAp - AutomotiveCd - Typical manufacturing
Cm - Kalling Etched Micrography by OMDf - Transverse Section
Equiaxial grains of a ferritic structure, in a transverse section of the tube.
35
VIEW
ML00026 / Feb.2017
Autogenous Seam Welded Tube in Ferritic SS
M - Ferritic Stainless SteelP - Fabrication WeldAp - AutomotiveCd - Typical manufacturing
Cm - Kalling Etched Micrography by OMDf - Equiaxial Grains

+5 more from this case →

ML00021 — 5/16" CMn Steel Plate for Pressure VesselM - CMn SteelP - PlateAp - Oil and GasCd - Typical manufacturing
Ferritic perlitic microstructure, banded, in the center of the 5/16" thick C-Mn plate. Refined Structure.
64
VIEW
ML00021 / Dec.2017
5/16" CMn Steel Plate for Pressure Vessel
M - CMn SteelP - PlateAp - Oil and GasCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Banded Pearlite
Ferritic perlitic microstructure, banded, in the center of the 5/16" thick C-Mn plate. Refined Structure.
54
VIEW
ML00021 / Dec.2017
5/16" CMn Steel Plate for Pressure Vessel
M - CMn SteelP - PlateAp - Oil and GasCd - Typical manufacturing
Cm - Nital Etched Micrography by OMDf - Longitudinal Section