超临界二氧化碳乳液电沉积制备耐磨防腐Co-Ni-P镀层（英文）

Fabrication of Co-Ni-P film with excellent wear and corrosion resistance by electroplating with supercritical CO_2 emulsion

为避免析氢反应带来的缺陷以及提高传统水浴电沉积镀层的抗磨耐蚀性能,采用超临界二氧化碳(Sc-CO_2)乳液电沉积制备三元Co-Ni-P合金镀层,并与传统方法制备的镀层的显微组织、耐蚀性和摩擦学性能进行对比研究。结果表明,Sc-CO_2乳液电沉积制备的Co-Ni-P镀层结构更加致密,镀层的择优取向由传统水镀液制备的hcp (110)变为Sc-CO_2乳液制备的hcp (100);此外,Sc-CO_2乳液电沉积能显著提高Co-Ni-P镀层的显微硬度、耐蚀性和摩擦学性能。

To avoid the defects caused by the hydrogen evolution and improve the corrosion and wear properties of the electroplated films in the traditional aqueous bath electrodeposition,a supercritical carbon dioxide(Sc-CO2)emulsion was proposed to electrodeposite ternary nanocrystalline Co-Ni-P alloy films.Microstructure,corrosive and tribological properties of the Co-Ni-P films were investigated and compared with the ones electroplated by conventional method.The results show that the Co-Ni-P films produced with Sc-CO2assisted electrodeposition exhibit a more compact microstructure.The preferred orientation plane of hcp(110)for the Co-Ni-P films produced in conventional aqueous bath is changed to be hcp(100)for the one prepared in emulsified Sc-CO2bath.The microhardness,corrosion resistance and tribological properties of the Co-Ni-P films are substantially improved with the assistance of Sc-CO2in the electrodeposition bath.