标题：Study on influencing factors and mechanisms of electro-assisted chemical conversion on titanium
作者：Zhao, Xingchuan; Huang, Baoxu; Ma, Jie; Chen, Hui; Wang, Changzheng; Lu, Yupeng
作者机构：[Zhao, Xingchuan; Huang, Baoxu; Ma, Jie; Chen, Hui; Wang, Changzheng] Liaocheng Univ, Sch Mat Sci & Engn, Liaocheng 252000, Shandong, Peoples R China. 更多
通讯作者：Wang, Changzheng;Wang, CZ;Lu, YP
通讯作者地址：[Wang, CZ]Liaocheng Univ, Sch Mat Sci & Engn, Liaocheng 252000, Shandong, Peoples R China;[Lu, YP]Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Sha 更多
关键词：Titanium; Microstructure; Adhesion; Electrodeposition; Iron powder; curing
摘要：Using titanium (Ti) for clinical implants often requires surface modification to improve long-term stability and biological activity. However, due to the presence of stable oxide film, modifying the surface of Ti by chemical conversion is difficult. In this research, an electro-assisted method was used to rapidly form chemical transformation coatings on Ti. The effects of Fe2+ and temperature on the phase composition, microstructures, properties, and the formation mechanism of coatings were investigated. The temperature affected the hydrogen evolution by changing the overpotential of hydrogen, thereby affecting the composition of the coatings. The coatings formed at 60 degrees C were mainly composed of hopeite, whereas those formed at 30 degrees C mainly composed of elemental zinc (Zn). Fe2+ promoted the reduction of Zn2+ by abnormal co-deposition with Zn2+ and then changed the morphology and properties of the conversion coating. (C) 2019 Elsevier B.V. All rights reserved.