Coating

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Crevice Corrosion in a Subsea System — Aspect Before Analysis

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Micrography close to the surface of the blade, showing the diffusion coating (aluminum base alloy) that is still sound. No strong oxidation or erosion was detected.
53
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ML00042 / Apr.2017
Gas Turbine Blade IN 939, Coated
M - NiCrCo AlloyP - CastAp - Gas TurbineCd - Intergranular Cracking
Cm - H2SO4+HNO3+H3PO4 Etched MicroDf - Coating

More from these cases

ML00042 — Gas Turbine Blade IN 939, CoatedM - NiCrCo AlloyP - CastAp - Gas TurbineCd - Intergranular Cracking
Micrographic detail of the diffusion coating. H2SO4 + HNO3 + H3PO4 etched.
47
VIEW
ML00042 / Apr.2017
Gas Turbine Blade IN 939, Coated
M - NiCrCo AlloyP - CastAp - Gas TurbineCd - Intergranular Cracking
Cm - Micrography by SEMDf - Coating