Aqueous corrosion, atmospheric corrosion, and ionic liquid dissolution studies were performed on commercial alloys AZ31B, AM60, and AZ91D and compared with previously reported results for single-phase binary Mg–Al alloys containing similar Al concentrations ( α Mg-2 at% Al, α Mg-5 at% Al, and Mg-8 at% Al). Polarization studies in 0.6 M NaCl were used to characterize the aqueous free corrosion behavior during 20-h free immersion. Accelerated corrosion testing was performed using a rotating-disk electrode which revealed the evolution of an Al-rich mud-cracking and platelet morphology. Atmospheric droplet testing showed rapid pH increases that depended on the Al concentration in the alloy. Time-dependent contact angle measurements showed that the degree of droplet wetting increased during free corrosion by ∼50° over 20 h in 0.6 M NaCl. Ionic liquid dissolution studies in 1:2 M choline chloride:urea deep eutectic solvent were performed in order to examine the current-volt...

中文翻译：

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商业镁铝合金的腐蚀：AZ31B，AM60和AZ91D

在商品合金AZ31B，AM60和AZ91D上进行了水腐蚀，大气腐蚀和离子液体溶解研究，并将其与先前报道的含铝浓度相似的单相二元Mg-Al合金（αMg-2 at％Al， αMg-5 at％Al和Mg-8 at％Al）。在0.6 M NaCl中的极化研究用于表征20小时自由浸没期间的水自由腐蚀行为。使用转盘电极进行了加速腐蚀测试，该电极揭示了富铝泥裂和血小板形态的演变。大气液滴测试显示pH迅速升高，这取决于合金中Al的浓度。随时间变化的接触角测量结果表明，在0.6 M NaCl中的20 h内，自由腐蚀过程中液滴的润湿程度增加了约50°。