| ZHANG En-yao,CHEN Yun-gui.Corrosion Inhibition and Mechanism of LaFe11.6Si1.4 Alloy Implanted with Ions[J],46(2):194-198 |
| Corrosion Inhibition and Mechanism of LaFe11.6Si1.4 Alloy Implanted with Ions |
| Received:September 19, 2016 Revised:February 20, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.02.032 |
| KeyWord:LaFe11.6Si1.4 alloy morphology analysis electrochemical method ion implantation Cr2O3 passivation layer corrosion mechanism |
| Author | Institution |
| ZHANG En-yao |
Xi′an Aeronautical Polytechnic Institute, Xi′an , China |
| CHEN Yun-gui |
Sichuan University, Chengdu , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to improve the corrosion resistance of the alloy through the one anti-corrosion protective layer produced on the surface of LaFe11.6Si1.4 alloy after the Cr ion implantation. By means of surface ion implantation, Cr ions were implanted when the implantation voltages were respectively 20 kV, 30 kV and 40 kV, and the implantation dosages were 5×1016 ions/cm2, 10×1016 ions/cm2 and 50×1016 ions/cm2. Electron scanning microscope and X-ray spectroscope were used to analyze the morphology and structure as well as compositions of alloy. The corrosion resistance of alloy implanted with surface ions was studied in the electrochemical method. When the implantation voltage of Cr ion was 40 kV, the implantation dosages were 5×1016 ions/cm2, 1×1017 ions/cm2 and 5×1017 ions/cm2, respectively and the open-circuit potentials of alloy were respectively -0.585, -0.584 and -0.57 V (vs. SCE). When the implantation dosage of Cr ions was 5×1017 ions/cm2, the implantation voltages were respectively 20 kV, 30 kV and 40 kV, and the open-circuit potentials of alloy were respectively -0.63, -0.61 -0.57 V (vs. SCE). These results showed that with the increase in the implantation dosage and implantation voltage of Cr ions, the corrosion potential on the alloy surface moved in the forward direction and the corrosion resistance was improved. Conclusion The implantation of Cr ions has significantly improved the corrosion resistance of the alloy. Based on the analysis, the improved corrosion resistance is mainly attributable to the one anti-corrosion Cr2O3 passivation layer generated on the alloy surface. In addition, α-Fe from the surface phase La(Fe,Si)13 caused by the bombardment of implanted ions has also improved the electrode potential of alloy and enhanced the corrosion resistance. |
| Close |
|
|
|