Selective dissolution during acid pickling of aluminum alloys by element-resolved electrochemistry,Electrochimica Acta

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Selective dissolution during acid pickling of aluminum alloys by element-resolved electrochemistry
Electrochimica Acta ( IF 5.5 ) Pub Date : 2021-12-15 , DOI: 10.1016/j.electacta.2021.139737
B. Bin Mohamad Sultan _{1,

2} , D. Thierry _{2,

3} , J.M. Torrescano-Alvarez ₁ , K. Ogle ₁

Affiliation

The surface reactivity and the elemental dissolution of a high-strength aerospace alloy (AA7449-T651) during acid pickling was investigated with element-resolved electrochemistry (AESEC). The results demonstrated a sequential dissolution of Mg, Al, Zn and Cu, following the order of their respective galvanic reactivity in common acid pickling solutions. The enrichment of Cu during pickling with the H₂SO₄ solution was observed. The effect of oxidizing solution components HNO₃ and Fe(III) on Cu dissolution were investigated using an experimental Evans diagram approach.

中文翻译：

铝合金酸洗过程中元素分辨电化学的选择性溶解

使用元素解析电化学 (AESEC) 研究了酸洗过程中高强度航空合金 (AA7449-T651) 的表面反应性和元素溶解。结果表明，Mg、Al、Zn 和 Cu 按照它们在普通酸洗溶液中各自的电偶反应性顺序依次溶解。观察到在用 H ₂ SO ₄溶液酸洗过程中 Cu 的富集。使用实验性埃文斯图方法研究了氧化溶液组分 HNO ₃和 Fe(III) 对 Cu 溶解的影响。

更新日期：2021-12-24

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