Optical Microscope

4 cases · 5 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Condition: Removed From Service Detail focus: Close to the Internal Surface clear all

Optical Microscope — sub-branches

NH4OH+H2O+H2O2 Etched Micro 2Nital Etched Micrography by OM 3

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Micrographic detail of a transverse section of the tubing, close to the internal surface. Ferritic-pearlitic structure, refined.
20
VIEW
ML00116 / Jan.2018
CMn Steel Structural Tubing 6 mm thick
M - CMn SteelP - Seamless Round ShapeAp - StructureCd - Removed From Service
Cm - Nital Etched Micrography by OMDf - Close to the Internal Surface
Micrographic detail of a transverse section of the tubing, close to the internal surface. Ferritic-pearlitic structure. Very close to the surface the amount of ferrite is higher than in the center and the grain is coarser, due to a decarburization effect probably occurred when the surface was exposed to high temperature during manufacturing.
13
VIEW
ML00115 / Jan.2018
CMn Steel Structural Tubing 5 mm thick
M - CMn SteelP - Seamless Round ShapeAp - StructureCd - Removed From Service
Cm - Nital Etched Micrography by OMDf - Close to the Internal Surface
Micrography of a transverse section of the tubing, close to the internal surface. Ferritic-pearlitic structure, refined.
16
VIEW
ML00114 / Jan.2018
CMn Steel Structural Tubing 8 mm thick
M - CMn SteelP - Seamless Round ShapeAp - StructureCd - Removed From Service
Cm - Nital Etched Micrography by OMDf - Close to the Internal Surface
The micrography of the transverse section shows coarse grains and biphasic structure. No diferentes close to the internal surface. Alpha grains and a lamellar eutectoid structure can be observed in the material.
46
VIEW
ML00044 / Feb.2017
Centrifugally Cast CuAl Bushing
M - Aluminum BronzeP - Cast BushingAp - EngineCd - Removed From Service
Cm - NH4OH+H2O+H2O2 Etched MicroDf - Close to the Internal Surface

More from these cases

ML00044 — Centrifugally Cast CuAl BushingM - Aluminum BronzeP - Cast BushingAp - EngineCd - Removed From Service
Micrographic detail of the structure at the internal surface.
38
VIEW
ML00044 / Feb.2017
Centrifugally Cast CuAl Bushing
M - Aluminum BronzeP - Cast BushingAp - EngineCd - Removed From Service
Cm - NH4OH+H2O+H2O2 Etched MicroDf - Close to the Internal Surface