アルミニウムおよびアルミニウム合金の孔食成長に伴う自然電極電位変化
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概要
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An anodic dissolution test in NaCl solution, electrochemical polarization measurements and a corrosion test in AlCl3 solution were carried out. The order of corrosion potential after pit growth is; high purity aluminum< Al-Mg<aluminum<Al-Mn. The order qualititatively agrees with that in AlCl3 solution. Active dissolution types of electrochemical polarization characteristics are observed in AlCl3 solution. Corrosion rates estimated from polarization curves coincide with those from an immersion test. Corrosion potentials, Ecorr, on pitted materials are explained on the bases of anodic polarization characteristics in AlCl3 and cathodic polarization characteristics in NaCl solutions. Change of Ecorr value with pit growth can be understood considering expansion of local anode area.
- 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
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