Corrosion behaviour of fibre-reinforced Al composites

Erosive–corrosive wear of aluminum alloy composites: Influence of slurry composition and speed

“…The interface of Al/dispersoid plays a significant role in controlling the overall performance of the composites in erosive-corrosive conditions. The formation of reaction products like Al 4 C 3 , or the preferential precipitation of intermetallics at Al/dispersoid interface, resulted in preferential attack at these locations [34][35][36]. However, a few investigators have reported that the Al/dispersoid interfaces are not the sites for preferential attack, rather preferential attack occurred at the Al/intermetallic interfaces [16,37,38].…”

Corrosion of aluminum-matrix composites. Status report

“…However, in the solutions employed, most corrosion rates were so high as to make the results inapplicable for present purposes. In another early study, Evans and Braddick (1971) noted, in 02-8aturated 3% NaCl, severe attack at the interface in B/Al composites. As is often the case, details of processing and composition were not given.…”

Corrosion Behavior of a P130x Graphite Fiber Reinforced 6063 Aluminum Composite Laminate in Aqueous Environments

“…Further, while the effects of various environments including distilled water, aqueous solutions of NaC1 and Na2SO4, and sea water have been investigated in earlier studies (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12), no systematic study of the effects of electrolyte pH, aeration, and the presence of sulfite (SO~-) ions has been reported to date. The apparently conflicting viewpoints of various investigators about the role of galvanic corrosion, for instance, seem to be particularly perplexing, suggesting that the corrosion behavior may be greatly influenced by the processing history of the material.…”

“…Graphite fiber reinforced aluminum matrix composites are known to have poor resistance to corrosion in aqueous environments (1)(2)(3)(4). Various mechanisms have been proposed to explain this corrosion susceptibility.…”

“…Various mechanisms have been proposed to explain this corrosion susceptibility. Galvanic coupling between aluminum and graphite is generally thought to be a dominant corrosion mechanism in Gr-A1 composites (1)(2)(3)(4)(5)(6)(7). Galvanic corrosion has also been found to initiate crevices at the fiber-matrix interface, thereby promoting crevice corrosioh (5).…”