Scanning Electron Microscope

2 cases · 4 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Fine Transgranular Precipitation clear all

Scanning Electron Microscope — sub-branches

Micrography by SEM 2 Surface Aspect by SEM 2

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The scanning electron microscopy image of the internal surface of the tube in position 2 shows a localized corrosion region with intergranular morphology, as well a crack from the corroded region.

1237

ML00086 / Nov.2017

Intergranular Corrosion of Sensitized 304SS

M - Austenitic Stainless SteelP - Seamless tubeAp - Heat ExchangerCd - Intergranular Corrosion

Cm - Surface Aspect by SEMDf - Intergranular Corrosion

Micrography of the blade, view inside the grain. The intragranular precipitation presents one unique size of precipitation, not yet coalesced, although the blade was in high temperature service for 50.000 hours. Etched by H2SO4 + HNO3 + H3PO4 reagent.

66

ML00042 / Apr.2017

Gas Turbine Blade IN 939, Coated

M - NiCrCo AlloyP - CastAp - Gas TurbineCd - Intergranular Cracking

Cm - Micrography by SEMDf - Intragranular Secondary Precipitation

More from these cases

ML00086 — Intergranular Corrosion of Sensitized 304SSM - Austenitic Stainless SteelP - Seamless tubeAp - Heat ExchangerCd - Intergranular Corrosion

193

ML00086 / Nov.2017

Intergranular Corrosion of Sensitized 304SS

M - Austenitic Stainless SteelP - Seamless tubeAp - Heat ExchangerCd - Intergranular Corrosion

Cm - Surface Aspect by SEMDf - Intergranular Corrosion

ML00042 — Gas Turbine Blade IN 939, CoatedM - NiCrCo AlloyP - CastAp - Gas TurbineCd - Intergranular Cracking

47

ML00042 / Apr.2017

Gas Turbine Blade IN 939, Coated

M - NiCrCo AlloyP - CastAp - Gas TurbineCd - Intergranular Cracking

Cm - Micrography by SEMDf - Coating