Sampling and Analysis

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Crevice Corrosion in a Subsea System — Aspect Before Analysis

Product: Fabrication Weld Application: Boiler Capture method: NItal Etched Macro clear all

Sampling and Analysis — sub-branches

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Macrography of the plate (thickness 22mm, in horizontal position) to tube (thickness 12.5 mm, in vertical position) welded joint. The half V groove was welded from the top (position inside the combustion chamber) in five weld beads, and with a small fillet welded from the water side (ouside of the tube). Average hardness of the plate is 180HV1 (1kg), of the tube is 150HV1 and of the weld is 190HV1. Maximum hardness of the tube HAZ is 165HV1 and plate HAZ is 195HV1.

219

ML00119 / Feb.2018

Thermal Fatigue of a Marine Boiler

M - Low Carbon SteelP - Fabrication WeldAp - ShipCd - Thermal Fatigue

Cm - NItal Etched MacroDf - Welded Joint