| QUAN Xian-hou,GUO Rui-guang,TANG Chang-bin,LU Shuang-bao.Modification Research of Sodium Fluoroaluminate Conversion Coating on Aluminum Alloy[J],42(3):59-62 |
| Modification Research of Sodium Fluoroaluminate Conversion Coating on Aluminum Alloy |
| Received:December 29, 2012 Revised:February 02, 2013 |
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| DOI： |
| KeyWord:6063 aluminum alloy sodium fluoroaluminate conversion coating sodium silicate corrosion resistance |
| Author | Institution |
| QUAN Xian-hou |
Key Laboratory of Northwest Water Resource, Environment and Ecology of Ministry of Education,Xi'an University of Architecture and Technology, Xi'an , China |
| GUO Rui-guang |
Key Laboratory of Northwest Water Resource, Environment and Ecology of Ministry of Education,Xi'an University of Architecture and Technology, Xi'an , China |
| TANG Chang-bin |
Key Laboratory of Northwest Water Resource, Environment and Ecology of Ministry of Education,Xi'an University of Architecture and Technology, Xi'an , China |
| LU Shuang-bao |
Key Laboratory of Northwest Water Resource, Environment and Ecology of Ministry of Education,Xi'an University of Architecture and Technology, Xi'an , China |
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| Abstract: |
| Sodium fluoroaluminate conversion coating on the surface of 6063 aluminum alloy was modified. The optimal operation parameters were as follows: NaF 7 . 5 g / L, Na2SiO35 g / L, ( NaPO3)63 g / L, NH4VO35 g / L, pH 3 . 0 ~ 4 . 0 , ordinary temperature, 20 minutes. After conversion treatment by the process, the polarization curve measurement of the Al alloy showed that corrosion potential increased by about 70 mV and corrosion current density decreased by about 90 % , the corrosion resistance of the Al alloy was improved obviously, the neutral salty test time of Al specimen reached up to 264 hours. |
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