SYMPOSIA PAPER Published: 01 January 1985

Assessing the Corrosion Resistance of Metal Matrix Composite Materials in Marine Environments


The corrosion resistance of graphite/aluminum (Gr/Al) and silicon carbon/aluminum (SiC/Al) metal matrix composite (MMC) materials and composite corrosion protection methods were investigated in marine environmental exposures ranging from 30 to 365 days. Accelerated corrosion of the Gr/Al resulted from galvanic interactions between the graphite fibers and the aluminum matrix. Corrosion of the SiC/Al was due to pitting, which was oriented at the silicon carbide-aluminum interfaces in the discontinuous forms of silicon carbide reinforcement. Differences in surface foil alloy and composite structure for the Gr/Al or type of silicon carbide reinforcement for the SiC/Al did not affect the materials' overall corrosion resistance. A variety of corrosion control coatings was found to be suitable for protection of the MMC, including organic and thermal-sprayed coatings.

Author Information

Aylor, DM
David W. Taylor Naval Ship Research and Development Center, Bethesda, MD
Kain, RM
LaQue Center for Corrosion Technology, Inc., Wrightsville Beach, NC
Price: $25.00
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Developed by Committee: D30
Pages: 632–647
DOI: 10.1520/STP32817S
ISBN-EB: 978-0-8031-4929-8
ISBN-13: 978-0-8031-0436-5