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Crevice Corrosion in a Subsea System — Aspect Before Analysis

Application: Kitchen Condition: Typical manufacturing Capture method: Optical Microscope clear all

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Micrography of the fork handle in the transverse section, curved, presenting differences between grain size and morphology. In the middle section there are elongated grains and close to the surfaces there are smaller and more equiaxed grains.
81
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ML00151 / Dec.2018
Ferritic Stainless Steel of a Flatware Fork
M - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Cm - Micro by OM, HCl + Ethanol + Picric AcidDf - Transverse Section

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ML00151 — Ferritic Stainless Steel of a Flatware ForkM - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Micrography of the fork handle in the center of the transverse section, curved, presenting larger ferritic grains with elongated morphology.
70
VIEW
ML00151 / Dec.2018
Ferritic Stainless Steel of a Flatware Fork
M - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Cm - Micro by OM, HCl + Ethanol + Picric AcidDf - Granular structure
Micrographic detail of the ferritic grains with elongated morphology in the center of the transverse section, curved.
58
VIEW
ML00151 / Dec.2018
Ferritic Stainless Steel of a Flatware Fork
M - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Cm - Micro by OM, HCl + Ethanol + Picric AcidDf - Ferrite
The micrography as polished in the transverse section shows a small amount of inclusions in the steel.
62
VIEW
ML00151 / Dec.2018
Ferritic Stainless Steel of a Flatware Fork
M - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Cm - As polished micrographyDf - Non Metallic Inclusions
Detail of the non metallic inclusions in the steel. The yellow and black colours and morphologies suggest Ti base and oxides.
65
VIEW
ML00151 / Dec.2018
Ferritic Stainless Steel of a Flatware Fork
M - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Cm - As polished micrographyDf - Non Metallic Inclusions
Micrography of a longitudinal section of the fork, at the scoop to handle position (scoop to the right of the figure and handle to the left). The full thickness is presented in the image and it is possible to see that in the handle location the ferritic grains are larger in the center of the thickness than close to the surfaces, and in the scoop position the grains tend to be more uniform through the thickness.
50
VIEW
ML00151 / Dec.2018
Ferritic Stainless Steel of a Flatware Fork
M - Ferritic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Typical manufacturing
Cm - Micro by OM, HCl + Ethanol + Picric AcidDf - Longitudinal Section

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