Determination of cathodic and anodic charge from operando x-ray tomography observation of galvanic corrosion of aluminum alloy 7050-T7451 and 304 stainless steel in a simulated fastener

Veronica Rafla; Alison Davenport; John R. Scully

doi:10.5006/1871

Determination of cathodic and anodic charge from operando x-ray tomography observation of galvanic corrosion of aluminum alloy 7050-T7451 and 304 stainless steel in a simulated fastener

Veronica Rafla^*, Alison Davenport, John R. Scully

^*Corresponding author for this work

Metallurgy and Materials

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Operando x-ray computed tomography (XCT) was used to observe the hidden corrosion damage in a simulated fastener of aluminum alloy (AA) 7050-T7451 coupled to 304 stainless steel under a droplet of NaCl at 97% relative humidity. Four fissures grew during the exposure in the aluminum alloy. The volume of corrosion damage was monitored over time and the anodic charge was determined from XCT slice voxel analysis. The maximum theoretical cathodic charge available for the cathodic reactions on the stainless steel and other sources (intermetallic particles and copper replating in the AA7050) could support the growth of multiple fissures.

Original language	English
Pages (from-to)	1300-1303
Number of pages	4
Journal	Corrosion
Volume	71
Issue number	11
DOIs	https://doi.org/10.5006/1871
Publication status	Published - Nov 2015

Keywords

Aluminum 7050
Galvanic corrosion
X-ray tomography

ASJC Scopus subject areas

Materials Science(all)
Chemical Engineering(all)
Chemistry(all)

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title = "Determination of cathodic and anodic charge from operando x-ray tomography observation of galvanic corrosion of aluminum alloy 7050-T7451 and 304 stainless steel in a simulated fastener",

abstract = "Operando x-ray computed tomography (XCT) was used to observe the hidden corrosion damage in a simulated fastener of aluminum alloy (AA) 7050-T7451 coupled to 304 stainless steel under a droplet of NaCl at 97% relative humidity. Four fissures grew during the exposure in the aluminum alloy. The volume of corrosion damage was monitored over time and the anodic charge was determined from XCT slice voxel analysis. The maximum theoretical cathodic charge available for the cathodic reactions on the stainless steel and other sources (intermetallic particles and copper replating in the AA7050) could support the growth of multiple fissures.",

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T1 - Determination of cathodic and anodic charge from operando x-ray tomography observation of galvanic corrosion of aluminum alloy 7050-T7451 and 304 stainless steel in a simulated fastener

AU - Rafla, Veronica

AU - Davenport, Alison

AU - Scully, John R.

PY - 2015/11

Y1 - 2015/11

N2 - Operando x-ray computed tomography (XCT) was used to observe the hidden corrosion damage in a simulated fastener of aluminum alloy (AA) 7050-T7451 coupled to 304 stainless steel under a droplet of NaCl at 97% relative humidity. Four fissures grew during the exposure in the aluminum alloy. The volume of corrosion damage was monitored over time and the anodic charge was determined from XCT slice voxel analysis. The maximum theoretical cathodic charge available for the cathodic reactions on the stainless steel and other sources (intermetallic particles and copper replating in the AA7050) could support the growth of multiple fissures.

AB - Operando x-ray computed tomography (XCT) was used to observe the hidden corrosion damage in a simulated fastener of aluminum alloy (AA) 7050-T7451 coupled to 304 stainless steel under a droplet of NaCl at 97% relative humidity. Four fissures grew during the exposure in the aluminum alloy. The volume of corrosion damage was monitored over time and the anodic charge was determined from XCT slice voxel analysis. The maximum theoretical cathodic charge available for the cathodic reactions on the stainless steel and other sources (intermetallic particles and copper replating in the AA7050) could support the growth of multiple fissures.

KW - Aluminum 7050

KW - Galvanic corrosion

KW - X-ray tomography

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DO - 10.5006/1871

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JO - Corrosion

JF - Corrosion

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ER -

Determination of cathodic and anodic charge from operando x-ray tomography observation of galvanic corrosion of aluminum alloy 7050-T7451 and 304 stainless steel in a simulated fastener

Abstract

Keywords

ASJC Scopus subject areas

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