Scanning Electron Microscope

3 cases · 4 images for “corrosion”

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Condition: Preferential Dissolution clear all

Scanning Electron Microscope — sub-branches

Micrography by SEM 1 Nital Etched Micrography by SEM 1 Surface Aspect by SEM 2

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Micrography of the seam welded joint, autogenous. The localized dissolution occurrs exactly at the weld metal that presents a bainitic structure and Vickers (100g) microhardness values about 230HV, compared to the heat affected zone presenting average of 202 HV and the base metal presenting average of 180HV.

59

ML00140 / May.2019

Preferential Corrosion of Pipe Seam Weld

M - Low Carbon SteelP - Longitudinal Seam Welded PipeAp - ShipCd - Preferential Dissolution

Cm - Nital Etched Micrography by SEMDf - Welded Joint

Scanning electron microscopy aspect of the region inside of a pit. The aspect is of a chemical attack, generated by the metabolic by-products of the adhered microorganism. The effect is of a localized dissolution and the granular tube microsctruture is revealed.

40

ML00170 / Sep.2020

MIC in Aluminum Brass Tubes

M - Aluminum BrassP - Seamless tubeAp - MaritimeCd - Preferential Dissolution

Cm - Surface Aspect by SEMDf - Corrosion

Aspect of the surface of the platesheet at a corroded area, showing the selective attack effect.

99

ML00125 / Mar.2018

Dezincification of a Cooler Tubesheet

M - BrassP - PlateAp - ShipCd - Preferential Dissolution

Cm - Surface Aspect by SEMDf - Corrosion

More from these cases

ML00140 — Preferential Corrosion of Pipe Seam WeldM - Low Carbon SteelP - Longitudinal Seam Welded PipeAp - ShipCd - Preferential Dissolution

35

ML00140 / May.2019

Preferential Corrosion of Pipe Seam Weld

M - Low Carbon SteelP - Longitudinal Seam Welded PipeAp - ShipCd - Preferential Dissolution

Cm - Micrography by SEMDf - Corrosion