The corrosion behavior and corrosion rate of friction stir welded AZ31B magnesium alloy and 6N01 aluminum alloy dissimilar joints were studied using real-time imaging, potentiodynamic polarization, EIS, and hydrogen evolution tests. The corrosion rate was found to increase, in order, Al base metal (BM-6N01) < Mg base metal (BM-AZ31B) < stirred zone. The galvanic coupling of the Mg phase to the other phases enhanced the corrosion of both BM-AZ31B and BM-6N01. Accompanying the intense corrosion at BM-AZ31B, water reduction on the cathodic particles of BM-6N01 elevated the interfacial pH to a level where the Al matrix corroded to AlO₂⁻.

中文翻译：

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搅拌摩擦焊AZ31B镁合金与6N01铝合金异种接头的电偶腐蚀行为

利用实时成像，恒电位极化，EIS和析氢试验研究了搅拌摩擦焊AZ31B镁合金和6N01铝合金异种接头的腐蚀行为和腐蚀速率。发现腐蚀速率按顺序增加，铝基金属（BM-6N01）<镁基金属（BM-AZ31B）<搅拌区。Mg相与其他相的电流耦合增强了BM-AZ31B和BM-6N01的腐蚀。伴随在BM-AZ31B强烈腐蚀，在BM-6N01的阴极颗粒还原水升高的界面pH至其中所述Al基体腐蚀到的AlO的水平₂ ^- 。