Layer Detachment

1 case · 3 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Product: Raw Material clear all

Results

SortNewestOldestTitle A-ZTitle Z-A
Aspect of the male part of the coupling, a pin, presenting the thermal spray layer detachment (right side of the figure). The pin was manufactured in a superduplex stainless steel tubular forging; the external surface was partially coated by thermal spray and machined. The sealing is only elastomeric but a coating is required to avoid galling between the two materials of the coupling.
1154
VIEW
ML00146 / Jul.2018
Plastic Deformation of a SDSS Riser Pin
M - Super Duplex Stainless SteelP - PinAp - O&G Well DrillingCd - Bending
Cm - Aspect Before AnalysisDf - Layer Detachment

More from these cases

ML00146 — Plastic Deformation of a SDSS Riser PinM - Super Duplex Stainless SteelP - PinAp - O&G Well DrillingCd - Bending
Micrography of a longitudinal section, at the damage surface of the pin, where the thermal spray layer was partially detached and broken. The through layer breaking is ductile, typical of an overloading condition caused by the localized bending of the pin.
109
VIEW
ML00146 / Jul.2018
Plastic Deformation of a SDSS Riser Pin
M - Super Duplex Stainless SteelP - PinAp - O&G Well DrillingCd - Bending
Cm - NaOH Electrolytic Etched MicroDf - Layer Detachment
Micrographic detail of the damage surface layer, detached and broken. The substrate is not affected and the rupture of the layer is typically by overloading.
117
VIEW
ML00146 / Jul.2018
Plastic Deformation of a SDSS Riser Pin
M - Super Duplex Stainless SteelP - PinAp - O&G Well DrillingCd - Bending
Cm - NaOH Electrolytic Etched MicroDf - Layer Detachment