| WANG Yue,MAN Rui-lin,ZHAO Peng-fei,HU Jun-li.Study on Regeneration of Ageing Liquid for Stainless Steel Coloring by Electrochemical Oxidation[J],(5):114-118 |
| Study on Regeneration of Ageing Liquid for Stainless Steel Coloring by Electrochemical Oxidation |
| Received:April 01, 2012 Revised:October 20, 2012 |
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| DOI： |
| KeyWord:electrochemical oxidation ageing liquid cyclic voltammetry stainless steel coloring |
| Author | Institution |
| WANG Yue |
College of Chemistry and Chemical Engineering, Central South University, Changsha , China |
| MAN Rui-lin |
College of Chemistry and Chemical Engineering, Central South University, Changsha , China |
| ZHAO Peng-fei |
College of Chemistry and Chemical Engineering, Central South University, Changsha , China |
| HU Jun-li |
College of Chemistry and Chemical Engineering, Central South University, Changsha , China |
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| Abstract: |
| Electrochemical parameters of Cr2 (SO4)3 on Pb and Pb-PbO2 electrode in 1.0 mol/L H2SO4 were measured by cyclic voltammetry, respectively. Dual-chamber diaphragm cell, with Pb-PbO2 electrode as the anode, was used to electrochemical oxidation. The optimum conditions of electro-oxidation process were listed as following: 5% H2SO4 as cathode liquid, 5 A/dm2 anode current density, 7.5 h constant current electrolysis. The conversion of Cr3+ was 25.97%, and current efficiency was 68.45%. After being treated, the content of Cr6+ in ageing liquid was recovered to the effective range. The effect of colored stainless steels treated in the regenerated liquid was consistent with those treated in freshly prepared coloring liquid. |
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