Stress corrosion cracking mitigation of 7075-T6 aluminum alloy by thermal spray coatings

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Proceedings title2006 NACE Conference Papers
ConferenceNACE International Corrosion Conference 2006, March 12-16, 2006, San Diego, California, USA
Pages# of pages: 9
SubjectStress corrosion cracking; metallic coating; 7075 Aluminum alloy; thermal spray
AbstractHigh strength Al alloys used in aircraft structures are susceptible to stress corrosion cracking (SCC) in chloride containing environments. This paper outlines the work done to prevent SCC on 7075-T6 aluminum alloys as a function of the surface conditioning and with three different galvanic coatings. Coatings of pure Al, Al-Mg, and Al-Mg-Zn were applied by twin wire arc spraying and evaluated in 3.5 wt. % NaCl solution. Environment assisted cracking tests were performed using a four point loading set up under tensile fluctuating load at low frequency (0.1 Hz). Results indicate that shot peening is beneficial and SCC is inhibited by anodic thermal spray metallic coatings.
Publication date
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedNo
NRC number48846
NPARC number18398989
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Record identifier434bda7b-c8df-41ac-a14c-f1e1253566c3
Record created2011-08-17
Record modified2016-05-09
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