Electroplating solution and electroplating method of trivalent iron system alkaline solution for electrodepositing invar alloy
Application number 201610156459. X Application date 2016.03.18 Applicant Xiamen University Address 361000, No.42 2 Siming South Road, Xiamen City, Fujian Province Inventor Yang Fangzu Huang Xianjie Run Hui Huang Shuishai Tian Zhongqun Zhou Shaomin Patent agency Xiamen First Junhe Patent Office Name of invention An electroplating solution and electroplating method for electrodepositing Invar alloy in alkaline solution of trivalent iron system Summary The present invention discloses an electroplating solution and an electroplating method for electrodepositing invar alloy with alkaline solution of trivalent iron system, which belongs to the field of electrodeposited alloy, and relates to electroplating of invar alloy by electrodeposition. Process, including electroplating solution composition and electroplating process parameters. The Invar alloy described in the present invention is an iron-based high-nickel alloy, and usually contains 32 to 36 wt.% (mass fraction) of nickel. The invention adopts an alkaline solution system containing trivalent iron salt and mixed complexing agent, combined with specific electroplating process conditions, thereby electroplating to obtain Invar alloy with a specific range of nickel content. The electric forging fluid includes ferric salt, salt, mixed complexing agent, buffer, additive and wetting agent; the electroplating process parameters are: temperature 40~65 ° C, pH 8. 5 ~ 11. 5, current density 1. 0 ~12. OA/dm2, the stirring method is air stirring or mechanical stirring. The present invention can be electroplated to obtain an Invar alloy plating layer with a uniform thickness of 0.1 to 10 μm and a nickel content of 34 to 36%, and the appearance is smooth and glossy. |