Selective dissolution of gold in an alkaline thiourea solution by electrolysis

1997 ◽  
Vol 4 (2) ◽  
pp. 73-78 ◽  
Author(s):  
Chuanfu Zhang ◽  
Liyuan Chai ◽  
Haiyun Zhong ◽  
Masazumi Okido ◽  
Ryouichi Ichino
Keyword(s):  
Selective Dissolution ◽  
Alkaline Thiourea ◽  
Thiourea Solution ◽  
Selective Dissolution Of Gold

Study on selective dissolution of gold in alkaline thiourea media

1997 ◽  
Vol 4 (2) ◽  
pp. 79-83 ◽  
Author(s):  
Liyuan Chai ◽  
Haiyun Zhong ◽  
Chuanfu Zhang ◽  
Masazumi Okido ◽  
Ryouichi Ichino
Keyword(s):  
Selective Dissolution ◽  
Alkaline Thiourea ◽  
Selective Dissolution Of Gold

Optimization of efficient stable reagent of alkaline thiourea solution for gold leaching

2003 ◽  
Vol 10 (4) ◽  
pp. 292-296 ◽  
Author(s):  
Yun-yan Wang ◽  
Li-yuan Chai ◽  
Xiao-bo Min ◽  
De-wen He ◽  
Bing Peng
Keyword(s):  
Gold Leaching ◽  
Alkaline Thiourea ◽  
Thiourea Solution ◽  
Stable Reagent

Research status and prospect of gold leaching in alkaline thiourea solution

2006 ◽  
Vol 19 (13) ◽  
pp. 1301-1306 ◽  
Author(s):  
Su Zheng ◽  
Yun-yan Wang ◽  
Li-yuan Chai
Keyword(s):  
Gold Leaching ◽  
Research Status ◽  
Alkaline Thiourea ◽  
Thiourea Solution

Gold Leaching in an Alkaline Thiourea Solution

1999 ◽  
Vol 146 (2) ◽  
pp. 559-563 ◽  
Author(s):  
Dawei Wei ◽  
Liyuan Chai ◽  
Ryoichi Ichino ◽  
Masazumi Okido
Keyword(s):  
Gold Leaching ◽  
Alkaline Thiourea ◽  
Thiourea Solution

Effect of Na2SO3 on electrochemical aspects of gold dissolution in alkaline thiourea solution

1999 ◽  
Vol 53 (3) ◽  
pp. 255-266 ◽  
Author(s):  
Liyuan Chai ◽  
Masazumi Okido ◽  
Wanzhi Wei
Keyword(s):  
Gold Dissolution ◽  
Alkaline Thiourea ◽  
Thiourea Solution

The Effects of Ion Implantation on the Surface Features of Inconel 600

1985 ◽  
Vol 43 ◽  
pp. 288-289
Author(s):  
John D. Rubio
Keyword(s):  
Grain Boundary ◽  
Ion Implantation ◽  
Nuclear Power ◽  
Power Plants ◽  
Surface Region ◽  
Selective Dissolution ◽  
Boundary Region ◽  
Near Surface ◽  
Inconel 600 ◽  
Steam Generator Tubing

The degradation of steam generator tubing at nuclear power plants has become an important problem for the electric utilities generating nuclear power. The material used for the tubing, Inconel 600, has been found to be succeptible to intergranular attack (IGA). IGA is the selective dissolution of material along its grain boundaries. The author believes that the sensitivity of Inconel 600 to IGA can be minimized by homogenizing the near-surface region using ion implantation. The collisions between the implanted ions and the atoms in the grain boundary region would displace the atoms and thus effectively smear the grain boundary.To determine the validity of this hypothesis, an Inconel 600 sample was implanted with 100kV N2+ ions to a dose of 1x1016 ions/cm2 and electrolytically etched in a 5% Nital solution at 5V for 20 seconds. The etched sample was then examined using a JEOL JSM25S scanning electron microscope.

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