A surface treatment method of dark gray zinc alloy combined with af coating
A surface treatment and zinc alloy technology, which is applied in the direction of superimposed layer plating, metal material coating process, coating, etc., can solve the problems of poor corrosion resistance, mechanical performance decline, aging deformation and other problems of zinc alloy, and achieve strong anti-corrosion Corrosion ability, effect of improving corrosion resistance
Active Publication Date: 2020-06-09
XIAN SHENGJIN NEW MATERIAL TECH
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Problems solved by technology
[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a dark gray zinc alloy surface treatment method combined with AF coating, aiming at solving the problem that the current zinc alloy has poor corrosion resistance, aging and deformation after a long time, mechanical There will also be a noticeable drop in performance
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[0024] The present invention provides a dark gray zinc alloy surface treatment method combined with AF coating. In order to make the objectives, technical solutions and effects of the present invention clearer and clearer, the present invention will be described in further detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0025] It is stated in advance that the zinc alloy of the present invention adopts ZA4-1, and its main components are: aluminum 3.5%~4.5%, copper 0.75%~1.25%, magnesium 0.03%~0.08%, and the balance is zinc. The sum of impurities is ≤0.2%.
[0026] See figure 1 , figure 1 It is a flowchart of a preferred embodiment of a dark gray zinc alloy surface treatment method combined with AF coating according to the present invention. As shown in the figure, it includes:
[0027] Step S100, sandblasting the surface of the zinc alloy;
[0028] Step S200, ...
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The invention discloses a dark grey zinc alloy surface treatment method combining AF coating. The method comprises the following steps: step A, carrying out sand blasting treatment on the surface of zinc alloy; step B, carrying out CNC carving machining on the zinc alloy subjected to sand blasting treatment; step C, sequentially carrying out electrolytic degreasing, ultrasonic cleaning and acid pickling activating treatment on the zinc alloy subjected to CNC carving machining; and step D, sequentially carrying out copper preplating, brass tin plating, alkaline copper plating, PCP plating, dark chrome plating and AF coating on the surface of the zinc alloy treated in the step C so as to obtain a finished product. By carrying out AF coating treatment on the surface of the zinc alloy, the surface of the zinc alloy can be compact and flat, so that the corrosion resistance of the product surface is improved. The surface of the product has strong corrosion resistance and does not contain nickel or chromium, so that the product can smoothly pass the experiments of mobile phone industry insiders. As the surface of the product is plated with one layer of nanometer-level AF coating in a vapor deposition manner, the functions of preventing fingerprints and assisting wiping also can be performed.
Description
Technical field [0001] The invention relates to the technical field of surface treatment, in particular to a surface treatment method of dark gray zinc alloy combined with AF coating. Background technique [0002] Zinc alloy has the characteristics of high specific gravity, good casting performance, various surface treatments, and good room temperature mechanical properties and wear resistance. Zinc alloy die-casting mobile phone shell not only saves costs, but also can be die-casted with high-quality and practical mobile phone shell, which is favored by more and more mobile phone manufacturers. However, the corrosion resistance of zinc alloys is poor, and a long time will cause aging and deformation, and the mechanical properties will also be significantly reduced. [0003] In the mobile phone market, the low-key, steady dark gray has always been loved by business people. Therefore, there is a need to study dark gray zinc alloys that can pass the mobile phone industry test stand...
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IPC IPC(8): C23C28/00
CPCC23C28/321C23C28/34
Inventor 孙嵘杨朋杰辛亚纯曾翠霞
Owner XIAN SHENGJIN NEW MATERIAL TECH