Purpose

The composition and corrosion behaviors of recycled and virgin Pb anode were investigated in industrial zinc electrowinning solution with different methods. The purpose of this study is the illustration of good anticorrosion activity of virgin Pb anodes compared to recycled one in industrial operation, while the compositions of both of them are the same which obtained from quantmetry method.

Design/methodology/approach

Its corrosion properties and electrocatalytic activity toward oxygen evolution reaction were appraised using potentiodynamic polarization, electrochemical impedance spectroscopy, galvanostatic polarization and ionic equilibrium methods. In addition, composition of anodes investigated with X-ray photoelectron spectroscopy (XPS) method. The surface composition of samples was studied via X-ray diffractogram (XRD).

Findings

The results indicate that the anodes display different anodic behaviors during the galvanostatic polarization. Virgin Pb anode shows a “potential reduction” about 320 mV lower than recycled Pb anode after 6 h of polarization; also, the stable potential after 72 h for virgin Pb anode is 100 mV lower than recycled Pb anode. Also, The XPS results show a trace amount of Cl in recycled anodes which cause the more corrosion activity. XRD results indicate that virgin Pb anodes have been covered by more oxides than recycled anodes after 72 h of electrowinning.

Originality/value

The treatment of corrosion behavior by virginity has not been detected by any researchers yet. Therefore, it is imperative to study the corrosion behavior and exact composition analysis of virgin and recycled Pb anodes to comprehension of them. This paper fulfills this need.

中文翻译：

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锌电解沉积工业中使用的原始和再生铅阳极的腐蚀行为研究

目的

用不同的方法研究了在工业锌电解沉积溶液中再生铅和纯铅阳极的组成和腐蚀行为。这项研究的目的是说明原始Pb阳极与工业生产中的循环阳极相比具有良好的防腐活性，而两者的组成均通过定量方法获得。

设计/方法/方法

使用电位动力学极化，电化学阻抗谱，恒电流极化和离子平衡方法评价了其腐蚀性能和对氧释放反应的电催化活性。另外，用X射线光电子能谱法（XPS）研究了阳极的组成。通过X射线衍射图（XRD）研究样品的表面组成。

发现

结果表明，在恒电流极化过程中，阳极表现出不同的阳极行为。极化6小时后，纯Pb阳极的“电位降低”比再生Pb阳极低约320 mV。同样，纯铅阳极在72小时后的稳定电位比再生铅阳极低100 mV。而且，XPS结果显示，在循环阳极中存在痕量的Cl，这会导致更大的腐蚀活性。XRD结果表明，电解沉积72小时后，纯Pb阳极比再生阳极覆盖的氧化物更多。

创意/价值

尚未有任何研究者通过处女来处理腐蚀行为。因此，有必要研究纯铅和再生铅阳极的腐蚀行为和精确的成分分析，以理解它们。本文满足了这一需求。