Corrosion Protection of Al Alloys and Al-Based Metal Matrix Composites by Chemical Passivation.

摘要

Chemical passivation by immersion of Aluminum alloys and Aluminum 6061 Silicon Carbide and Aluminum 6061/graphite metal matrix composites in a Cerium Chloride solution produces very corrosion-resistant surfaces. Aluminum 6061 and Aluminum 7075-T6 that had been immersed in 1000 ppm Cerium Chloride for one week did not suffer from pitting corrosion during immersion in aerated 0.5 N NaCl for three weeks. For Aluminum 7075-T73 some improvement of the corrosion resistance was also achieved, but to a much lesser extent. Chemical passivation in Cerium chloride was also successful for Aluminum/Silicon Carbide and Allgraphite. Corrosion protection, Aluminum alloys, Chemical passivation, Metal matrix composites, Reprints. (JG)