Effect of Mn2+ on the anodic film and corrosion behavior of Pb-Ca-Sn alloy anode in copper electrowinning

Anodic polarization behavior of ternary alloy Pb-0.08%Ca-1%Sn is studied by potentiodynamic polarization measurements, corrosion rate, the products on electrode surface after polarization, and microstructure of anode mud after polarization in electrowinning cell. The results show that Pb-Ca-Sn anode is easy to be passivated in electrolyte for copper electrowinning, the maintaining passivity current density is 97.72 µA•cm-2and the corrosion products on the surface of Pb-Ca-Sn electrode present loose scaly, being composed of α-PbO2, β- PbO2and PbSO4after polarization.

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Effect of Anodic Films on Galvanic Corrosion Behavior of TC4 Titanium Alloy and LY12 Aluminum Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.998-999.39 ◽

2014 ◽

Vol 998-999 ◽

pp. 39-42

Author(s):

Zhi Yong Wu ◽

Xue Yuan Li ◽

Li Ning Zhao ◽

Su Rong Hu

Keyword(s):

Titanium Alloy ◽

Aluminum Alloy ◽

Corrosion Behavior ◽

Galvanic Corrosion ◽

Anodic Film ◽

Corrosion Mechanism ◽

Anodic Films ◽

Galvanic Current ◽

Corrosion Morphology ◽

Tc4 Titanium Alloy

Galvanic corrosion behavior of TC4 titanium alloy coupled LY12 aluminum alloy was investigated in 3.5% NaCl solution. Particular attention was given to the effect of three different oxidation films. Galvanic corrosion test was conducted on TC4 titanium alloy which coupled LY12-sulfuric acid anodic film (LY12/A(S)), LY12-chromic acid anodic film (LY12/A(Cr)), LY12-hard anodic film (LY12/A(S) hd) and bare LY12, respectively. Galvanic corrosion current (Ig) and average galvanic current density (Ig’) were monitored. Corrosion morphology was observed by camera and corrosion mechanism was discussed. The results show that the three anodic films improve the corrosion resistance of the anode in different magnitudes. LY12/A(S) hd is found to be least susceptible to galvanic corrosion when coupled TC4 titanium alloy. LY12/A(S) and LY12/A(Cr) are found to be moderately susceptible to galvanic corrosion. But the bare LY12 is highly susceptible to galvanic corrosion in corrosive environment.

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Influence of Ga and Hg on microstructure and electrochemical corrosion behavior of Mg alloy anode materials

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(07)60278-7 ◽

2007 ◽

Vol 17 (6) ◽

pp. 1363-1366 ◽

Cited By ~ 35

Author(s):

Yan FENG ◽

Ri-chu WANG ◽

Kun YU ◽

Chao-Qun PENG ◽

Wen-xian LI

Keyword(s):

Corrosion Behavior ◽

Anode Materials ◽

Electrochemical Corrosion ◽

Mg Alloy ◽

Alloy Anode ◽

Electrochemical Corrosion Behavior

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Corrosion Behavior Improvements of High Active Aluminum Alloy Anode in Alkaline Solution by Adding Inhibitors

Materials Science Forum - Progress in Light Metals, Aerospace Materials and Superconductors ◽

10.4028/0-87849-432-4.1153 ◽

2007 ◽

pp. 1153-1158

Author(s):

Shu Quan Liang ◽

Yong Zhang ◽

Yan Tang ◽

Shao Qiang Li ◽

Xiao Ping Tan

Keyword(s):

Aluminum Alloy ◽

Corrosion Behavior ◽

Alkaline Solution ◽

Alloy Anode ◽

Active Aluminum ◽

Aluminum Alloy Anode

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Sem Studies of Co-Cr-Mo Surgical Implant Alloy Corrosion Behavior

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100055448 ◽

1982 ◽

Vol 40 ◽

pp. 520-521

Author(s):

Ann Chidester Van Orden ◽

John L. Chidester ◽

Anna C. Fraker ◽

Pei Sung

Keyword(s):

Electron Microscopy ◽

Corrosion Behavior ◽

Anodic Polarization ◽

Saline Solution ◽

Saturated Calomel Electrode ◽

Physiological Saline ◽

X Ray ◽

Physiological Saline Solution ◽

Scanning Electron

The influence of small variations in the composition on the corrosion behavior of Co-Cr-Mo alloys has been studied using scanning electron microscopy (SEM), energy dispersive x-ray analysis (EDX), and electrochemical measurements. SEM and EDX data were correlated with data from in vitro corrosion measurements involving repassivation and also potentiostatic anodic polarization measurements. Specimens studied included the four alloys shown in Table 1. Corrosion tests were conducted in Hanks' physiological saline solution which has a pH of 7.4 and was held at a temperature of 37°C. Specimens were mechanically polished to a surface finish with 0.05 µm A1203, then exposed to the solution and anodically polarized at a rate of 0.006 v/min. All voltages were measured vs. the saturated calomel electrode (s.c.e.).. Specimens had breakdown potentials near 0.47V vs. s.c.e.

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