| ZHOU Hui-yun,LI Ji-hong,LIU Bin,CAO Zu-jun,LIU Guang-ming.Study on Corrosion Inhibition Process of Electroless Nickel Coating[J],43(5):81-86 |
| Study on Corrosion Inhibition Process of Electroless Nickel Coating |
| Received:July 30, 2014 Revised:August 25, 2014 |
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| DOI： |
| KeyWord:electroless Ni-P coating phytic acid sodium silicate ammonium molybdate hydrogen peroxide corrosion resistance |
| Author | Institution |
| ZHOU Hui-yun |
Nanchang Radio and Television University, Nanchang , China |
| LI Ji-hong |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| LIU Bin |
School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang , China |
| CAO Zu-jun |
School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang , China |
| LIU Guang-ming |
School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang , China |
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| Abstract: |
| Objective To improve the corrosion resistance of electroless Ni-P coating. Methods Passivation treatment for corrosion inhibition was conducted with phytic acid, sodium silicate, ammonium molybdate and hydrogen peroxide on the electroless NiP coating prepared on the steel substrate. The variation of corrosion resistance was investigated by dropping test and filter paper method. The optimal compositions of passivation solution were obtained by orthogonal experiments. Results The results showed that the complex inhibitor solution composed of phytic acid, sodium silicate, ammonium molybdate and hydrogen peroxide had good corrosion resistance in nitric acid dropping test. The electrochemical test showed that the corrosion current density of the composite passivation coating decreased and the impedance values increased by more than one order of magnitude. Conclusion The synergistic effect among the components in the passivation solution was observed. The optimized compositions of passivation solution were 6 cg/L of phytic acid, 6 g/L of sodium silicate, 4 g/L of ammonium molybdate, and 30 mL/L of hydrogen peroxide. |
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