为阻止氢离子在电沉积铬过程中与三价铬离子竞争析出,提高金属铬电沉积效率,选用1631这种含氮的阳离子表面活性剂作为阻氢剂,在硫酸铵+硼酸介质中扫描极化曲线,利用极化曲线法研究1631在铬电极表面的阻氢作用,以析氢过电位为指标,选取1631浓度、溶液pH值、温度和搅拌速度为影响阻氢效果的4因素,设计L9(34)的正交试验.经优化,确定1631阻氢的最佳试验条件为:1631浓度20 mg/L,温度45℃,pH值2.4,搅拌速度0.42 mL/s.在该工艺条件下,对含有20 mg/L 1631的硫酸铬铵进行电沉积铬,金属铬沉积的电流效率提高了12.23%,1631起到了很好的阻氢作用.研究表明,1631是提高铬电沉积效率的有效阻氢剂.
参考文献
| [1] | 冯小龙,火时中.三价铬镀铬近期进展[J].材料保护,1993(01):18. |
| [2] | Demin A A;Nechaev E A;Danilov F I .Influence of Organic Substances on the Electrodeposition of Chromium from an Electrolyte Based on Cr(Ⅲ)[J].Elektrohimiya,1987,23(02):262-265. |
| [3] | Oberto V;Cuneyt A;Paul D .Laboratory Scale Investigation of the Electrowining of Chromium from Chrome-Alum Electrolyte[Z].EPD Congress,1994. |
| [4] | Lloyd R R.Electrowining of Chromium from Chromium-Alum Electrolyte[M].New York:Reinhold Publishing Corporation,1995:51-63. |
| [5] | Edigaryan A A;Polukarov Y M .Chromium deposition from diluted sulfate solution[J].Zashchita Metallov,1996,32(05):504-508. |
| [6] | Antropov L I;Pogrebova I S.Advances in Science and Technology[J].Corrosion and Protection of Metals Izdat Viniti Moscow,1973(02):27-31. |
| [7] | Jiang X J;Zhang X S.Study on Electrowinning of Pure Chromium Metal from Chrome Ammonium Alum[J].J Iron & Steel Res Int J,2002:336-340. |
| [8] | 张晓顺,姜效军.大电流密度下铬电极析氢行为[J].过程工程学报,2002(03):214-218. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%