In this study, the particulate silver coatings were prepared on a 316L stainless steel by electroplating method. The effect of 3 main influencing factors, namely current density, electroplating time and silver solution composition, on the structure and properties of the coating was investigated. The SEM data indicated that the average size of silver grains was about 20 µm. | Vietnam Journal of Science and Technology 56 (3B) (2018) 71-78 PARTICULATE SILVER COATING ON 316L STAINLESS STEEL FOR BIOMEDICAL IMPLANTS Ly Pham Thi1, *, Tuan Nguyen Van1, Ha Pham Thi1, Nam Vu Hong2, Nam Truong Thi1, Tuan Anh Nguyen1, Giang Pham Thi Thu2 1 Institute for Tropical Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 2 Faculty of chemical Technology, HaNoi University of Industry, Bac Tu Liem, Ha Noi * Email: Received: 15 August 2018; Accepted for publication: 8 September 2018 ABSTRACT In this study, the particulate silver coatings were prepared on a 316L stainless steel by electroplating method. The effect of 3 main influencing factors, namely current density, electroplating time and silver solution composition, on the structure and properties of the coating was investigated. The SEM data indicated that the average size of silver grains was about 20 µm. The optimal parameters for electrodeposition were AgNO3 concentration of M, current density of A/dm2 and plating time of 10 minutes. The optimal coating had lower silver ion release in simulated body fluid although the silver weight of this coating was higher than that of other coatings. Antibacterial efficiency of this coating was over 92 % in 60 min (against Escherichia Coli bacteria). After immersion for 168 h in simulated body fluid, concentration of silver released is not toxic to human body. Keywords: Silver coating, particulate silver, electroplating, biomedical implants. 1. INTRODUCTION For centuries, silver has been used for the treatment of burns, wounds and several bacterial infections [1]. Nowadays, silver has been incorporated into a variety of products and parts, especially products that are used in biomedical field such as artificial teeth, bone. to increase the antibacterial ability and to protect human health. According to the published scientific works, silver has been studied in a variety forms such as silver ion, silver zeolite, silver .
