Copper Alloy

4 cases · 10 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Capture method: Transverse Section Aspect clear all

Copper Alloy — sub-branches

Aluminum Brass 1Aluminum Bronze 2Brass 3Cupronickel 1Pure Copper 1Tin Bronze 1

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Transverse section of the tube in a position of localized thinning.
60
VIEW
ML00180 / Mar.2022
Local Melting of Copper Cooling Tubes
M - Pure CopperP - Cooling TubeAp - SiderurgyCd - Overheating
Cm - Transverse Section AspectDf - Localized Thinning
Macrography of a transverse section of the tube close to the leakage point, evidencing a localized thinning from the internal side of the tube.
65
VIEW
ML00170 / Sep.2020
MIC in Aluminum Brass Tubes
M - Aluminum BrassP - Seamless tubeAp - MaritimeCd - Preferential Dissolution
Cm - Transverse Section AspectDf - Localized Thinning
Transverse section of the tubesheet, after removal of the tubes. The seawater sie is to the top of the figure. It is possible to see regions of localized corrosion close to the tube position and a red layer all through the plate surface.
182
VIEW
ML00125 / Mar.2018
Dezincification of a Cooler Tubesheet
M - BrassP - PlateAp - ShipCd - Preferential Dissolution
Cm - Transverse Section AspectDf - Corrosion
The macrography of the transverse section shows the columnar grains typical of a centrifugally cast material. The etch is the same as the adopted for the micrographies. The bushing thickness is 1/2".
41
VIEW
ML00044 / Feb.2017
Centrifugally Cast CuAl Bushing
M - Aluminum BronzeP - Cast BushingAp - EngineCd - Removed From Service
Cm - Transverse Section AspectDf - Columnar Grains

More from these cases

ML00180 — Local Melting of Copper Cooling TubesM - Pure CopperP - Cooling TubeAp - SiderurgyCd - Overheating
Transverse section of the tube in a position of wall perforation.
32
VIEW
ML00180 / Mar.2022
Local Melting of Copper Cooling Tubes
M - Pure CopperP - Cooling TubeAp - SiderurgyCd - Overheating
Cm - Transverse Section AspectDf - Leakage
Local Melting of Copper Cooling Tubes
1
VIEW
ML00180 / Mar.2022
Local Melting of Copper Cooling Tubes
M - Pure CopperP - Cooling TubeAp - SiderurgyCd - Overheating
Cm - Transverse Section AspectDf - Thinning
Local Melting of Copper Cooling Tubes
1
VIEW
ML00180 / Mar.2022
Local Melting of Copper Cooling Tubes
M - Pure CopperP - Cooling TubeAp - SiderurgyCd - Overheating
Cm - Transverse Section AspectDf - Leakage
ML00170 — MIC in Aluminum Brass TubesM - Aluminum BrassP - Seamless tubeAp - MaritimeCd - Preferential Dissolution
Macrograhy of
5
VIEW
ML00170 / Sep.2020
MIC in Aluminum Brass Tubes
M - Aluminum BrassP - Seamless tubeAp - MaritimeCd - Preferential Dissolution
Cm - Transverse Section AspectDf - Localized Thinning
ML00125 — Dezincification of a Cooler TubesheetM - BrassP - PlateAp - ShipCd - Preferential Dissolution
Macrographic detail of the transverse section of the tubesheet at the cooper alloy tube position, after removal of the 5/8" tube. The red layer at the top of the plate (exposed to the cooling medium - treated seawater) is a region of selective corrosion, dezincification.
169
VIEW
ML00125 / Mar.2018
Dezincification of a Cooler Tubesheet
M - BrassP - PlateAp - ShipCd - Preferential Dissolution
Cm - Transverse Section AspectDf - Corrosion
Macrographic detail of the transverse section of the tubesheet at the cooper alloy tube position, after removal of the 5/8" tube. The "layer" at the top of the plate (exposed to the cooling medium - treated seawater) is a region of selective corrosion, dezincification. It is possible to see that in the right side of the figure, where the cooper tube was positioned, the corrosion damage is deeper.
153
VIEW
ML00125 / Mar.2018
Dezincification of a Cooler Tubesheet
M - BrassP - PlateAp - ShipCd - Preferential Dissolution
Cm - Transverse Section AspectDf - Dezincification