| SUN Min,WU Guo-long,WANG Ye,ZHANG Qun-li,YAO Jian-hua,Volodymyr S. Kovalenko.Ceramic Coating Prepared by Laser Cladding and Composite Micro-arc Oxidation on 316L Surface[J],48(2):24-32 |
| Ceramic Coating Prepared by Laser Cladding and Composite Micro-arc Oxidation on 316L Surface |
| Received:October 23, 2018 Revised:February 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.02.004 |
| KeyWord:316L laser cladding micro-arc oxidation bioactivity corrosion resistance |
| Author | Institution |
| SUN Min |
1.Institute of Laser Advanced Manufacturing, Zhejiang University of Technology, Hangzhou , China; 2.Zhejiang Provincial Collaboration Innovation Center of High-end Laser Manufacturing Equipment, Hangzhou , China |
| WU Guo-long |
1.Institute of Laser Advanced Manufacturing, Zhejiang University of Technology, Hangzhou , China; 2.Zhejiang Provincial Collaboration Innovation Center of High-end Laser Manufacturing Equipment, Hangzhou , China |
| WANG Ye |
1.Institute of Laser Advanced Manufacturing, Zhejiang University of Technology, Hangzhou , China; 2.Zhejiang Provincial Collaboration Innovation Center of High-end Laser Manufacturing Equipment, Hangzhou , China |
| ZHANG Qun-li |
1.Institute of Laser Advanced Manufacturing, Zhejiang University of Technology, Hangzhou , China; 2.Zhejiang Provincial Collaboration Innovation Center of High-end Laser Manufacturing Equipment, Hangzhou , China |
| YAO Jian-hua |
1.Institute of Laser Advanced Manufacturing, Zhejiang University of Technology, Hangzhou , China; 2.Zhejiang Provincial Collaboration Innovation Center of High-end Laser Manufacturing Equipment, Hangzhou , China |
| Volodymyr S. Kovalenko |
1.Institute of Laser Advanced Manufacturing, Zhejiang University of Technology, Hangzhou , China;3.Laser Technology Research Institute, National Technical University of Ukraine, Kiev 03056, Ukraine |
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| Abstract: |
| The work aims to improve the corrosion resistance and bioactivity of 316L stainless steel surface. The titanium coating was prepared on 316L by laser cladding, and then the micro-arc oxidation was carried out on the surface of the titanium layer. Therefore, porous ceramic coating containing Ca and P was prepared on the surface of 316L. The influence of the thickness of titanium layer on the surface morphology, element content and phase composition of ceramic coating was analyzed by SEM (Scanning Electron Microscope), EDS (Energy Dispersive Spectrometer) and XRD (X-Ray Diffraction). The corrosion resistance and bioactivity of the coating in 1.5× SBF solution were tested by electrochemical tests and immersion tests. Porous ceramic coating was prepared on 316L stainless steel by laser cladding and composite micro arc oxidation. The density and thickness of ceramic coating in situ formed by micro-arc oxidation increased with increase of the thickness of titanium layer. When the thickness of titanium layer reached 0.4 mm, the ceramic coating prepared by micro-arc oxidation was dense and the thickness of the dense coating reached 20 μm. The coating mainly consisted of anatase phase and rutile phase. From the polarization curve, the corrosion potential Ecorr was -0.162 V and the corrosion current density decreased to 5.11×10-7 A/cm2. After immersion in 1.5 times of SBF for 3 days, hydroxyapatite was observed on the surface of the ceramic coating. The ceramic coating prepared by laser cladding combined with micro-arc oxidation on 316L surface has excellent corrosion resistance in simulated body fluid, and can effectively improve the bioactivity of 316L stainless steel. |
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