Corrosion protection of Al alloys and Al-based metal-matrix composites by chemical passivation

Technical Report · Tue Aug 01 00:00:00 EDT 1989

OSTI ID:6820559

Mansfeld, F; Lin, S; Sim, S; Shih, H

Chemical passivation by immersion of aluminium alloys and aluminium 6061/ silicon carbide and aluminium 6061/graphite metal-matrix composites in cerium chloride solution produces very corrosion-resistant surfaces. Aluminium 6061 and aluminium 7075-T6 that had been immersed in 1000 ppm cerium chloride for one week did not suffer from pitting corrosion during immersion in acerated 0.5 N NaCl for three weeks. For aluminium 7075-T7l3 some improvement of the corrosion resistance was also achieved, but to a much lesser extent. Chemical passivation in cerium chloride was also successful for aluminium/silicon carbide and Allgraphite.

• Research Organization: University of Southern California, Los Angeles, CA (USA)
• OSTI ID: 6820559
• Report Number(s): AD-A-219242/5/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
360604 -- Materials-- Corrosion
Erosion
& Degradation
ALKALI METAL COMPOUNDS
ALLOYS
ALUMINIUM ALLOYS
CARBIDES
CARBON
CARBON COMPOUNDS
CERIUM CHLORIDES
CERIUM COMPOUNDS
CERMETS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COMPOSITE MATERIALS
CORROSION
CORROSION PROTECTION
CORROSION RESISTANCE
ELEMENTAL MINERALS
ELEMENTS
GRAPHITE
HALIDES
HALOGEN COMPOUNDS
MATERIALS
MINERALS
NONMETALS
PASSIVITY
RARE EARTH COMPOUNDS
SILICON CARBIDES
SILICON COMPOUNDS
SODIUM CHLORIDES
SODIUM COMPOUNDS
SURFACES