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Tuesday, December 4, 2007 - 10:00 AM
Surface Treatment to Remove Copper Bearing Intermetallic Particles from the Surface of AA 2024-T3
Aluminum alloys based on the Al-Cu (AA 2024) and Al-Zn-Mg-(Cu) (AA 7075) alloys are structural materials for applications where a high strength-to-weight ratio is required, such as for aircraft and aerospace vehicles. It is well established that second phase, intermetallic constituent particles and precipitates substantially influence the corrosion properties of these alloys. The high corrosion susceptibility of these alloys impacts the performance, service life, and reduces the effectiveness of the corrosion protection systems applied to these alloys. To address this problem, Luna Innovations has developed a surface treatment that selectively removes detrimental intermetallic particles from the surface of aluminum alloys such as AA 2024. Solution chemistries were optimized for copper removal using a combination of electrochemical measurement methods, scanning electron microscopy, and Auger spectroscopy. For certain solution conditions, copper Auger spectroscopy maps demonstrate surface copper removal. The solution development, surface analysis, and influence of surface copper removal on corrosion properties of aluminum alloy 2024-T3 will be discussed.
See more of Coating Removal and Pretreatment I
See more of The 2007 Tri-Service Corrosion Conference (December 3-7, 2007)
See more of The 2007 Tri-Service Corrosion Conference (December 3-7, 2007)