| TAN Min,LIU Yi-ning,LIU Jian-hua,HU Wei-da.Effect of Surface Sealing on Corrosion Resistance of Aluminum Cathode[J],46(3):229-235 |
| Effect of Surface Sealing on Corrosion Resistance of Aluminum Cathode |
| Received:August 25, 2016 Revised:March 20, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.03.035 |
| KeyWord:zinc electrodeposition corrosion resistance salt spray test sol-stearic acid sealing process aluminum cathode |
| Author | Institution |
| TAN Min |
School of Metallurgy and Material Engineering, Hunan University of Technology, Zhuzhou , China |
| LIU Yi-ning |
Zhuzhou Smelter Group Co., Ltd, Zhuzhou , China |
| LIU Jian-hua |
School of Metallurgy and Material Engineering, Hunan University of Technology, Zhuzhou , China |
| HU Wei-da |
School of Metallurgy and Material Engineering, Hunan University of Technology, Zhuzhou , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to prolong service life of aluminum cathode surface during zinc electrodeposition and reduce producing cost by improving its corrosion resistance. Different surface treatment processes were applied to aluminum cathode, corrosion resistance of the aluminum cathode subject to corrosion resistance treatment was studied by performing copper accelerated acetic acid salt spray test, corrosion electrolyte weight loss test and industrial expanded test. After 120 h salt-spray corrosion, only 9.5% of the sol-strearic acid sealed sample surface was corroded, nearly 50% and 27% of the boiling water-sealed sample and cerium salt-sealed sample were corroded respectively with corrosion holes and cracks. The surface of common aluminum plate was completely corroded and destroyed. After being corroded in zinc electrolyte for 32 min during the corrosion weight loss test, unit area weight loss of the sample sealed by sol-stearic acid was up to 0.4 mg/cm2, that of the samples sealed by boiling water and cerium salt was about 0.9 mg/cm2, and that of common aluminum sheets was 1.3 mg/cm2. In industrial expanded experiments, weight loss of aluminum cathode sealed by sol-stearic acid was about 1.8% after 40 days, and current efficiency of zinc electrodeposition stayed at nearly 91%, while weigh loss of common aluminum cathode plate was 7.7%. Moreover, the aluminum cathode plate sealed by sol-stearic acid for 90 days could be used normally while common aluminum cathode should be replaced due to corrosion damage. The corrosion resistance of aluminum cathode sealed by boiling water, cerium salt and sol-stearic acid increases respectively, the sol-stearic acid sealing works better. Surface sealing method plays a good role in improving the corrosion resistance of aluminum cathode while maintaining high current efficiency. |
| Close |
|
|
|