| XUE Yan,WANG Zhen-guo.Effect of Deposition Time on Properties of Ni-P-SiC Composite Coating on AZ91D Alloy[J],46(7):91-96 |
| Effect of Deposition Time on Properties of Ni-P-SiC Composite Coating on AZ91D Alloy |
| Received:January 22, 2017 Revised:July 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.07.015 |
| KeyWord:AZ91D magnesium alloy Ni-P-SiC composite plating thickness surface roughness corrosion wear |
| Author | Institution |
| XUE Yan |
Chongqing Vocational Institute of Engineering, Chongqing , China |
| WANG Zhen-guo |
Beihang University, Beijing , China |
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| Abstract: |
| The work aims to enhance corrosion and wear resistance of magnesium alloys. Ni-P-SiC composite coating was prepared by depositing AZ91D magnesium alloy in Ni-P electroless plating solution with 3 g/L SiC particle for different deposition time. Thickness, surface roughness, microhardness, wear and corrosion resistance of Ni-P-SiC composite coating were analyzed and evaluated with SEM, roughmeter, electrochemical corrosion and wear tests. The thickness and surface roughness of Ni-P-SiC composite coating increased as deposition time increased. When the deposition time was 150 min, the thickness and roughness were 53 μm and 2.5 μm, respectively; when the deposition time was 120 min, the maximum microhardness was 641HV, corrosion and wear resistance were the best, Ecorr, Jcorr and wear volume were −0.73 V, 0.78 µA/cm2 and 1.04×10−3 mm3, respectively. Compared with the AZ91D magnesium alloy, the sample produced after deposition exhibited better corrosion resistance after deposition, indicating that the Ni-P-SiC composite coating has improved corrosion resistance of the Mg alloy effectively. The properties of Ni-P-SiC composite coating are significantly influenced by deposition time. And the composite coating obtained at the deposition time of 120 min has better corrosion and wear resistance. |
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