Optical Microscope

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Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Duplex Ferritic Austenitic Standard: 790 Detail focus: Sampling and Analysis clear all

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NaOH Electrolytic Etched Micro 10

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Micrography of the heat affected zone of the pipe to the fitting, at the pipe position, where the weld is in angle to the pipe (welded at the pipe surface). Weld metal to the top.
85
VIEW
ML00150 / Dec.2018
Vibration Induced Fatigue in a SS Oil Piping
M - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Cm - NaOH Electrolytic Etched MicroDf - Heat Affected Zone

More from these cases

ML00150 — Vibration Induced Fatigue in a SS Oil PipingM - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Micrography of the heat affected zone of the pipe to the fitting, at the pipe position. Base metal to the bottom of the figure and fusion line to the top.
87
VIEW
ML00150 / Dec.2018
Vibration Induced Fatigue in a SS Oil Piping
M - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Cm - NaOH Electrolytic Etched MicroDf - Heat Affected Zone
Micrography of the heat affected zone (HAZ) of the pipe. The amount of ferrite in the HAZ is a little higher than in the pipe base metal.
86
VIEW
ML00150 / Dec.2018
Vibration Induced Fatigue in a SS Oil Piping
M - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Cm - NaOH Electrolytic Etched MicroDf - Heat Affected Zone
Micrography of the heat affected zone of the pipe to the fitting, at the fitting position. The fitting is welded in the thickness. The fusion line is in the bottom of the figure.
74
VIEW
ML00150 / Dec.2018
Vibration Induced Fatigue in a SS Oil Piping
M - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Cm - NaOH Electrolytic Etched MicroDf - Heat Affected Zone
Micrography of the heat affected zone (HAZ) of the fitting, welded to the pipe. The forged fitting base metal is to the top of the figure and the fusion line is to the bottom.
71
VIEW
ML00150 / Dec.2018
Vibration Induced Fatigue in a SS Oil Piping
M - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Cm - NaOH Electrolytic Etched MicroDf - Heat Affected Zone
Micrography of the heat affected zone (HAZ) of the fitting. The amount of ferrite in the HAZ is a little higher than in the pipe base metal.
70
VIEW
ML00150 / Dec.2018
Vibration Induced Fatigue in a SS Oil Piping
M - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Cm - NaOH Electrolytic Etched MicroDf - Heat Affected Zone

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