tailieunhanh - Study on the properties of silver plating on A6061 aluminum alloy

This article presents the properties of the silver plating on A6061 aluminum alloy. The structure, chemical composition, phase composition, thickness and corrosion durability of the plating are determined by scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), X-ray diffraction, corrosion current measurement, frost acceleration and hygrothermal test. | Vietnam Journal of Science and Technology 55 (5B) (2017) 265-271 STUDY ON THE PROPERTIES OF SILVER PLATING ON A6061 ALUMINUM ALLOY Vu Minh Thanh Institute of Chemistry and Materials, 17 Hoang Sam, Nghia Do, Cau Giay, Ha Noi, Viet Nam * Email: Vmthanh222@ Received: 11 August 2017; Accepted for publication: 9 October 2017 ABSTRACT This article presents the properties of the silver plating on A6061 aluminum alloy. The structure, chemical composition, phase composition, thickness and corrosion durability of the plating are determined by scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), X-ray diffraction, corrosion current measurement, frost acceleration and hygrothermal test. The results show that the silver plating has good corrosion resistance, is not blistered, remains white, light, no appearance of rust and other abnormalities. These parameters meet the technical requirements laid out for resonator of ultra - high frequency filter. Keywords: A6061 aluminum alloy, silver plating, structure, chemical and phase composition. 1. INTRODUCTION A6061 aluminum alloy (A6061) is a multi-purpose alloy with high-strength, anti-corrosion and has good weldability. In defense industry, this alloy is used in very large quantities. In order to further enhance the properties and functions of the product, aluminum alloy surfaces are often treated by anodizing or electroplating method [1 - 3]. In which aluminization is a method with constant interest. When aluminizing, aluminum alloy can improve electric conductivity, corrosion resistance, enhance hardness, antifriction [4 - 7]. Aluminization and aluminum alloys are relatively complex, so to enhance the quality of the plating, adherence with aluminum base requires intermediate treatment prior to plating [8 - 10]. The traditional silver plating technology uses the bath containing silver plating salt and free prussiate. Because cyanide compounds are toxic, environmental pollution, silver plating .