A6063合金押出材の黒斑発生に及ぼす表面処理条件の影響
スポンサーリンク
概要
- 論文の詳細を見る
Although the results of several investigations on the black spot formation on 6063 alloy extrusions have been reported, little information is available on the details of the effect of the surface treatment. The purpose of the present work is to make clear the factors controlling the formation of the black spot by the surface treatment and to confirm the origin of black coloring.The black discoloration of the specimens became remarkable with increase of time and temperature of the desmutting treatment in sulfuric or nitric acid solution, and was found to be strongly, dependent upon the pH value of rinsing water after the desmutting procedure. It was concluded that the black spot formation by the surface treatment originated from the corrosion reaction between the β' Mg2Si precipitates and the acid solution in the desmutting and subsequent water-rinsing treatment. The further observations showed that the aluminum interface at the black spot after anodizing was considerably rougher and fine particles were found in the anodic film which showed irregular cell structure.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
- Mechanical and wear properties of SiC whisker/ADC12 aluminum alloy composites fabricated by die casting.
- Joining of aluminum and ceramics.
- タイトル無し
- Undercooling and solidification behavior of fluid clumps of second-poured melt of hypereutectic Al-Si alloy in Duplex Casting process.
- Change in apparent viscosity of stirred slurry during production of semi-solid hypereutectic Al-Si alloy by slurry-melt mixing process.