Cr<sub>3</sub>C<sub>2</sub>掺杂Ni-P-PTFE化学复合镀层制备及性能

doi:10.19976/j.cnki.43-1448/TF.2024083

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Abstract To enhance the corrosion resistance and hardness of the surface of medical device components based on ferritic stainless steel, this study employed a chemical composite plating method to prepare xCr₃C₂/Ni-P-PTFE (polytetrafluoroethylene) coatings on the surface of ferritic stainless steel. The influences of Cr₃C₂ mass concentrations (10, 15, 20 g/L) on the hardness, surface morphology, phase composition, and corrosion resistance of the Ni-P-PTFE chemical composite plating coatings before and after heat treatment were investigated. The results indicate that the incorporation of Cr₃C₂ particles at a certain mass concentration results in a smoother and more even surface of the Ni-P-PTFE coating, reducing surface roughness while enhancing hardness and corrosion resistance. When the Cr₃C₂ mass concentration is 15 g/L, the Ni-P-PTFE-Cr₃C₂ coating exhibits a uniform and smooth surface with the lowest roughness and a hardness (HV_0.1) of 354; the surface corrosion current density decreases from 0.05 μA/cm2 to 0.02 μA/cm2, representing a 60% reduction and indicating superior corrosion resistance; after heat treatment (300 ℃, 2 h), due to the precipitation of Ni3P hard phase and Ni phase in the coating, the hardness (HV0.1) reaches 527, representing an increase of approximately 49%. The Ni-P-PTFE-Cr3C2 coating effectively improves the performance of the steel substrate used in medical device components.

Key words： Ni-P-PTFE-Cr₃C₂ chemical composite plating steel for medical device component hardness corrosion resistance

Received: 30 September 2024 Published: 05 February 2025

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TG174.4

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	WANG Jiangang
	XU Meiqi
	WANG Xue
	SUN Yihan
	WANG Yujiang

Cite this article:

WANG Jiangang,XU Meiqi,WANG Xue, et al. Preparation and properties of Cr₃C₂-doped Ni-P-PTFE chemical composite coating[J]. Materials Science and Engineering of Powder Metallurgy, 2024, 29(6): 514-521.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2024083 OR http://pmbjb.csu.edu.cn/EN/Y2024/V29/I6/514

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