108 アルミニウム合金とゴムとの接合体の腐食性雰囲気下での耐久性(OS7-(2) 材料損傷の機構・実験評価,オーガナイズドセッション)

概要

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The Aluminum alloy/rubber joints are applied to automotive suspension to maintain high level of silence and comfortableness. However, aluminum alloy is directly joined with rubber. Therefore it is necessary to suppress both corrosion of aluminum alloy and decohesion of rubber. In this study, the durability of aluminum alloy/rubber joints under corrosive atmospheres has been examined on several aluminum alloys: extruded 6N01, gravity-die-cast AC4CH, pressure-die-cast ADC12, ADC3 and Silafont36 alloys. Among them, only pressure-die-cast ADC12 alloy/rubber joint caused decohesion. It was found from the observations on the cross-sectional microstructure that the corrosion of ADC12 alloy was the major cause for the decohesion. This corrosion was attributable primarily to the high contents of harmful elements for corrosion such as Cu and Fe, and secondary to the fine microstructure caused by the pressure-die-casting process.
一般社団法人日本機械学会の論文
2009-08-25