Influence of galvanic interaction between chalcopyrite and galena on electrochemical and flotation behaviour of chalcopyrite

2021 ◽  
pp. 151475
Author(s):  
Baolin Ke ◽  
Jianhua Chen
Keyword(s):  
Galvanic Interaction

Galvanic interaction between gold and amalgam

2003 ◽  
Vol 134 (11) ◽  
pp. 1463-1467 ◽  
Author(s):  
RICHARD S. WALKER ◽  
A. GARDINER WADE ◽  
GELSOMINA IAZZETTI ◽  
NIKHIL K. SARKAR
Keyword(s):  
Galvanic Interaction

Local electrochemical behaviour of friction stir welded Mg-Al-Mn alloy joints

CORROSION ◽  
10.5006/3604 ◽  
2020 ◽  
Author(s):  
SITI HAWA MOHAMED SALLEH ◽  
Geraint Williams ◽  
Sebastian Thomas ◽  
Zhuoran Zeng ◽  
Beth McNally ◽  
...  
Keyword(s):  
Welded Joint ◽  
Electrochemical Behaviour ◽  
Scanning Electrochemical Microscopy ◽  
Electrochemical Characteristics ◽  
Electrochemical Tests ◽  
Friction Stir ◽  
Base Materials ◽  
Galvanic Interaction ◽  
Electrode Technique ◽  
Electrochemical Microscopy

Local scanning electrochemical microscopy (SECM), along with a scanning vibrating electrode technique (SVET), were employed to spatially map anodic and cathodic regions in a complex assembly including a friction stir lap welded joint between two Mg-Al-Mn alloys, namely AM60 and AM30. The assembly investigated herein was comprised of the two base materials (AM60 and AM30) and a stir zone (SZ). The transitory electrochemical characteristics of the three regions were perceived from different electrochemical tests and have been correlated to their respective microstructures. Potentiometric and voltametric SECM performed on the assembly in 0.01 M NaCl revealed that during the first few minutes of exposure, AM60 and SZ regions act as dominant anodic regions in the assembly whilst after 2 hours of exposure these regions transition to become cathodic relative to the AM30 region. Galvanic interaction between the different weld regions immersed in a significantly more conductive NaCl electrolyte was investigated by SVET. Under such conditions, filiform-like corrosion initiated, and propagated exclusively within the AM30 region, resulting in cathodic activation of the corroded surface. However, after approximately 5 hours of exposure, the AM60 region preferentially dissolves following sufficient cathodic activation of the AM30 region.

The Role of Galvanic Interaction During Ammonia Leaching of Multi Metal Sulphides

1992 ◽  
Vol 11 (1-2) ◽  
pp. 21-37 ◽  
Author(s):  
K. SARVESWARA RAO ◽  
R. K. PARAMGURU ◽  
R. P. DAS ◽  
H. S. RAY
Keyword(s):  
Ammonia Leaching ◽  
Galvanic Interaction

Galvanic interaction between galena and pyrite in an open system

2006 ◽  
Vol 25 (3) ◽  
pp. 230-237 ◽  
Author(s):  
Zhou Li ◽  
Li Heping ◽  
Xu Liping
Keyword(s):  
Open System ◽  
Galvanic Interaction

scholarly journals Effects of Galvanic Interaction between Chalcopyrite and Monoclinic Pyrrhotite on Their Flotation Separation

Minerals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 39
Author(s):  
Liu Yang ◽  
Xiaowen Zhou ◽  
Huashan Yan ◽  
Hongliang Zhang ◽  
Xiaohe Liu ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
The Other ◽  
X Ray ◽  
Flotation Recovery ◽  
Xps Characterization ◽  
Monoclinic Pyrrhotite ◽  
Galvanic Interaction ◽  
Monomineral Flotation ◽  
Sem Test ◽  
Scanning Electron

The galvanic interaction between chalcopyrite and monoclinic pyrrhotite and its effect on flotation separation were studied using monomineral flotation tests, adsorption capacity tests, X-ray photoelectron spectroscopy (XPS) characterization, and scanning electron microscopy (SEM) test. These results showed that the interaction promoted the reduction of O2 on the cathodic chalcopyrite surface and accelerated the generation of Fe(OH)3, which was not conducive to collector adsorption; hence, the flotation recovery decreased by 10–16%. On the other hand, galvanic interaction accelerated the oxidation of S on the anodic monoclinic pyrrhotite surface to S0 or SO42− and produced a large amount of H+, thus preventing the formation of Fe(OH)3. Meanwhile, the Cu2+ eluted from chalcopyrite surface activated monoclinic pyrrhotite; hence, the flotation recovery increased by 3–10%. Galvanic interaction reduced the floatability difference between the two minerals, and the separation difficulty was significantly increased. Even with an increase in the amount of lime, the separation could not be improved.

scholarly journals Studies of Grinding Media Corrosion from Galvanic Interaction on Galena Flotation

2014 ◽  
Vol 03 (03) ◽  
pp. 29-34 ◽  
Author(s):  
Ebrahim Allahkarami ◽  
Abdoreza Zarepoor ◽  
Bahram Rezai
Keyword(s):  
Grinding Media ◽  
Galvanic Interaction
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