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Surface treating method of zinc alloy products

A surface treatment and zinc alloy technology, which is applied in the field of surface treatment of zinc alloy products, can solve problems such as easy bubbling of the electroplating layer, easy corrosion of the surface of zinc alloy products, and insufficient bonding between the electroplating layer and the surface of the zinc alloy. To achieve the effect of strong anti-corrosion performance

Inactive Publication Date: 2009-04-01
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that the binding force between the electroplated layer on the surface of the existing zinc alloy product and the surface of the zinc alloy is not strong enough (the electroplated layer is relatively prone to bubbling, causing the surface of the zinc alloy product to be easily corroded), and provides A surface treatment method for zinc alloy products, so that the electroplating layer formed by the method has a strong bonding force with the surface of the zinc alloy, and has strong anti-corrosion performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] [Sample] ZZnAL4-1 die-casting product (BYD Co., Ltd.)

[0018] [handler]

[0019] Mechanical polishing→water washing→water washing→ultrasonic degreasing→water washing→water washing→electrodegreasing→water washing→water washing→acid activation→water washing→water washing→conversion coating treatment→water washing→water washing→water washing→electroplating→post-treatment

[0020] [Composition of treatment solution and treatment conditions]

[0021] Mechanical polishing: yellow medium-coarse polishing paste (SBT-600 model) and white fine polishing paste (SBW-804 model) produced by Jiangmen Jielixin Polishing Materials Co., Ltd.; polishing machine produced by Dongguan Jingmi Machinery Equipment Co., Ltd. (Model JM-101). For 10 minutes of rough polishing, the rotational speed of the polishing wheel is 1200 rpm; for 10 minutes of fine polishing, the rotational speed of the polishing wheel is 1500 rpm.

[0022] Ultrasonic degreasing: the power of ultrasonic cleaning machine...

Embodiment 2

[0068] [Sample] The same as in Example 1.

[0069] [Procedure] is the same as in Embodiment 1.

[0070] [Composition of treatment solution and treatment conditions]

[0071] Mechanical polishing: equipment and polishing ointment are the same as in Example 1. During rough polishing, the speed of the polishing wheel is 1300 rpm; during fine polishing, the speed of the polishing wheel is 1600 rpm.

[0072] Ultrasonic degreasing: the power of ultrasonic cleaning machine is 2.4Kw; the powerful wax removal water (MTJ 6 model) produced by Huji Chemical (Shanghai) Co., Ltd. is 100ml / liter, sodium phosphate is 20g / liter, and sodium carbonate is 20g / liter. Treatment conditions: Ultrasonic treatment in the above dewaxed water at 50°C for 5 minutes.

[0073] Electrolytic degreasing: The degreasing solution is the same as that in Example 1, the temperature is 50° C., the current density is 5 ampere / square decimeter, and the time is 2 minutes.

[0074] Acid activation:

[0075] The for...

Embodiment 3

[0096] [Sample] The same as in Example 1.

[0097] [Procedure] is the same as in Embodiment 1.

[0098] [Composition of treatment solution and treatment conditions]

[0099] Mechanical polishing: equipment and polishing ointment are the same as in Example 1. During rough polishing, the speed of the polishing wheel is 1500 rpm; during fine polishing, the speed of the polishing wheel is 1800 rpm.

[0100] Ultrasonic degreasing: the power of ultrasonic cleaning machine is 2.4Kw; the powerful wax removal water (MTJ 6 model) produced by Huji Chemical (Shanghai) Co., Ltd. is 120ml / liter, sodium phosphate is 30g / liter, and sodium carbonate is 25g / liter. Treatment conditions: Ultrasonic treatment in the above dewaxed water at 60°C for 20 minutes.

[0101] Electrolytic degreasing: The degreasing solution is the same as that in Example 1, the temperature is 70° C., the current density is 10 ampere / square decimeter, and the time is 5 minutes.

[0102] Acid activation:

[0103] The f...

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PUM

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Abstract

The invention provides a surface preparation method of a zinc alloy product. The method comprises the following steps, namely, surface polishing, degreasing and oil removal, acid activation and galvanization which are carried out to the zinc alloy product in sequence, wherein, the method also comprises the step of forming a conversion coating on the surface of the zinc alloy product before the galvanization; a galvanization layer and the zinc alloy surface formed by utilizing the surface preparation method of the zinc alloy product provided by the invention have relatively strong binding force and relatively strong anti-corrosion performance.

Description

technical field [0001] The invention relates to a surface treatment method for zinc alloy products. Background technique [0002] Due to the advantages of low forming temperature and easy processing, zinc alloy is widely used in the industrial field. However, zinc, the main component of zinc alloys, is an amphoteric metal with relatively negative electrode potential, sensitive to acid and alkali, and prone to chemical reactions leading to corrosion. Therefore, zinc alloy materials have disadvantages such as poor stability and low corrosion protection performance. Zinc alloys are usually electroplated to improve their corrosion resistance and decorative properties. However, the zinc alloy coating often has faults such as bubbling, uneven color, and dullness. At present, in order to improve the corrosion resistance of the electroplating layer on the surface of zinc alloy products and its bonding force with the surface of zinc alloy, many electroplating processes for zinc all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/24C25D5/34
Inventor 李金儡
Owner BYD CO LTD
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