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Electrodeposition of Co-doped hydroxyapatite coating on 316L stainless steel

The influences of scanning potential ranges, scanning times, scanning rates to form MgSrFNaHAp coating were investigated. The analytical results of FTIR, SEM, Xray, EDX, thickness and adhension of the obtained coating at scanning potential ranges of 0 ÷ - 1.7 V/SCE; scaning times of 5, scanning rate of 5 mV/s showed that MgSrFNaHAp coatings were single phase crystals of HAp, exhibiting rod shape with the thickness of 8.9 µm and the adhesion strength reaching 8.38 MPa. | Vietnam Journal of Science and Technology 56 (1) (2018) 94-101 DOI: 10.15625/2525-2518/56/1/10030 ELECTRODEPOSITION OF CO-DOPED HYDROXYAPATITE COATING ON 316L STAINLESS STEEL Vo Thi Hanh1, 2 *, Pham Thi Nam3, Nguyen Thu Phuong3, Dinh Thi Mai Thanh1, 4 1 Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 2 Hanoi University of Mining and Geology, 18 Pho Vien, Duc Thang, Bac Tu Liem, Ha Noi 3 4 Institute for Tropical Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi University of Science and Technology of Hanoi, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi * Email: vothihanh2512@gmail.com Received: 10 June 2017; Accepted for publication: 17 December 2017 Abstract. Hydroxyapatite (HAp) co-doped by magnesium (Mg), strontium (Sr), sodium (Na) and fluorine (F) was deposited on the 316L stainless steel (316L SS) substrate by electrodeposition method. The influences of scanning potential ranges, scanning times, scanning rates to form MgSrFNaHAp coating were investigated. The analytical results of FTIR, SEM, Xray, EDX, thickness and adhension of the obtained coating at scanning potential ranges of 0 ÷ 1.7 V/SCE; scaning times of 5, scanning rate of 5 mV/s showed that MgSrFNaHAp coatings were single phase crystals of HAp, exhibiting rod shape with the thickness of 8.9 µm and the adhesion strength reaching 8.38 MPa. Keywords: 316L stainless steel, electrodeposition, MgSrFNaHAp. Classification numbers: 2.7.1; 2.10.1. 1. INTRODUCTION HAp is applied in medical implant field because of its structure and biological activity similar to the natural bone [1]. HAp coating also protects for the metal surfaces against corrosion in the biological environment and prevents the release of metal ions from the substrates into the environment. However, pure HAp can be dissolved in the physiological environment which may lead to the disintegration of the coating and affect the implant fixation [2]. Thus, to reduce the dissolution and to further .