Localized corrosion of metal matrix composites in marine environments poses a serious concern to the structural integrity of components made of aluminum based composites. Studies on cast composites of aluminum alloys reinforced with different volume percent of SiC particles of different sizes indicated the enhanced susceptibility of composites to localized corrosion like pitting and crevice corrosion. Aging treatments were performed to enhance the resistance to pitting and crevice attack. These studies were performed to choose the electrochemical technique which provides the maximum information about the mechanism of attack with best sensitivity of detection.

Subject
Electrochemical impedance spectroscopy, Materials, Silicon carbide, Free corrosion potential, Open circuits, Corrosion attacks, Sodium chloride solution, Composites, Corrosion resistance, Localized corrosion, Aluminum alloys, Aging, Electrode potential
Keywords:
Composite materials, localized corrosion, pitting, electrochemical techniques
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1995
Association for Materials Protection and Performance (AMPP)
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