Chromate-free corrosion resistant conversion coatings for aluminum

Conference · Fri Jan 01 04:00:00 EST 1993

OSTI ID:6649121

Buchheit, R G ^[1]; Stoner, G E ^[2]

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1. Centaur Associates, Inc., Washington, DC (United States)
2. Virginia Univ., Charlottesville, VA (United States). Dept. of Materials Science and Engineering

We have developed a method for generating chromate-free corrosion resistant coatings on aluminum alloys using a process procedurally similar to standard chromate conversion. These coatings provide good corrosion resistance on 6061-T6 and 1100 A1 under salt spray testing conditions. The resistance of the new coating is comparable to that of chromate conversion coatings in four point probe tests, but higher when a mercury probe technique is used. Initial tests of paint adhesion, and under paint corrosion resistance are promising. Primary advantage of this new process is that no hazardous chemicals are used or produced during the coating operation.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States); Virginia Univ., Charlottesville, VA (United States). Dept. of Materials Science and Engineering
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6649121
• Report Number(s): SAND-93-0591C; CONF-9304103--1; ON: DE93009835
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ADHESION
ALUMINIUM
COATINGS
CORROSION RESISTANCE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
HYDROGEN COMPOUNDS
METALS
OXYGEN COMPOUNDS
PAINTS
PHYSICAL PROPERTIES
PROTECTIVE COATINGS
SALTS
SEAWATER
SPRAYS
WATER