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| Pressure solution of electrically conductive minerals in shallow crust-galvanic processes: A case study from pyrite under differential stress | |
| Qingyou Liu; Yanqing Zhang; Heping Li | |
| 2013 | |
| Source Publication | Applied Geochemistry
 |
| Volume | 29Issue:1Pages:144-150 |
| Abstract | The pressure dissolution behaviour of pyrite was investigated via its polarisation curve and using electrochemical impedance spectroscopy (EIS) in a FeCl3 solution under differential stress. The results showed that the pyrite pressure dissolution process is a galvanic corrosion process and that there is a negative linear relationship between the pyrite potential difference and the stress action. The EIS experiments confirm that the pyrite was in a passive state in a 0.0010 mol L-1 FeCl3 solution and that a thin surface layer of Fe1-yS2 was present. In a 0.010 mol L-1 FeCl3 solution, the pyrite was in a trans-passive state, in which the aforementioned passive layer became porous. In a 0.10 mol L-1 FeCl3 solution, the pyrite was in an active state, the surface layer dissolved completely, and a lattice layer of S-2(0) was created instead of a passive layer of S-0. Under the present stress conditions, the stress action did not change the pyrite electrochemical dissolution mechanism; however, the conditions decreased the charge transfer resistance and passive resistance and increased the species diffusion capacitance. |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/5114 |
| Collection | 地球内部物质高温高压实验室_地球内部物质高温高压实验室_期刊论文 |
| Recommended Citation GB/T 7714 | Qingyou Liu,Yanqing Zhang,Heping Li. Pressure solution of electrically conductive minerals in shallow crust-galvanic processes: A case study from pyrite under differential stress[J]. Applied Geochemistry,2013,29(1):144-150. |
| APA | Qingyou Liu,Yanqing Zhang,&Heping Li.(2013).Pressure solution of electrically conductive minerals in shallow crust-galvanic processes: A case study from pyrite under differential stress.Applied Geochemistry,29(1),144-150. |
| MLA | Qingyou Liu,et al."Pressure solution of electrically conductive minerals in shallow crust-galvanic processes: A case study from pyrite under differential stress".Applied Geochemistry 29.1(2013):144-150. |
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