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Open AccessArticle

Effect of Rare Earth Oxides on Microstructure and Corrosion Behavior of Laser-Cladding Coating on 316L Stainless Steel

1
School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China
2
School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
3
Laser Advanced Manufacturing Technology Center, University of Science and Technology Liaoning, Anshan 114051, China
*
Authors to whom correspondence should be addressed.
Coatings 2019, 9(10), 636; https://doi.org/10.3390/coatings9100636
Received: 23 September 2019 / Revised: 26 September 2019 / Accepted: 1 October 2019 / Published: 2 October 2019
(This article belongs to the Section Corrosion, Wear and Erosion)
The effect of rare earth oxides on the microstructure and corrosion behavior of laser-cladding coating on 316L stainless steel was investigated using hardness measurements, a polarization curve, electrochemical impedance spectroscopy (EIS), a salt spray test, X-ray diffraction, optical microscopy, and scanning electron microscopy (SEM). The results showed that the modification of rare earth oxides on the laser-cladding layer caused minor changes to its composition but refined the grains, leading to an increase in hardness. Electrochemical and salt spray studies indicated that the corrosion resistance of the 316L stainless steel could be improved by laser cladding, especially when rare earth oxides (i.e., CeO2 and La2O3) were added as a modifier. View Full-Text
Keywords: stainless steel; rare earth; laser cladding; corrosion stainless steel; rare earth; laser cladding; corrosion
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Xu, Z.; Wang, Z.; Chen, J.; Qiao, Y.; Zhang, J.; Huang, Y. Effect of Rare Earth Oxides on Microstructure and Corrosion Behavior of Laser-Cladding Coating on 316L Stainless Steel. Coatings 2019, 9, 636.

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