Preparation method of Ni-Cu-P/nano TiO2 chemical composite coating on surface of magnesium alloy

A chemical composite plating, ni-cu-p technology, applied in the direction of liquid chemical plating, metal material coating process, coating, etc., to achieve the effect of good wear resistance and corrosion resistance

Inactive Publication Date: 2010-11-17
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the research on chemical composite plating on the surface of magnesium alloys is less, and only a small amount of data report the electroless composite plating of Ni-P-TiO on magnesium

Method used

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  • Preparation method of Ni-Cu-P/nano TiO2 chemical composite coating on surface of magnesium alloy
  • Preparation method of Ni-Cu-P/nano TiO2 chemical composite coating on surface of magnesium alloy
  • Preparation method of Ni-Cu-P/nano TiO2 chemical composite coating on surface of magnesium alloy

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Experimental program
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Effect test

preparation example Construction

[0044] For the nanocomposite coating prepared by the preparation method of the present invention, carry out morphology observation, component analysis and performance test, the result finds: the coating surface has a metallic luster, and the crystal grains are fine; energy spectrum analysis results show that the composition of the chemical composite coating is Ni Mainly, the content is about 80wt%, the P content is about 10wt%, and the rest is basically Ti; X-ray analysis shows that Ni-Cu-P / nano-TiO 2 The chemical composite coating appeared TiO at 25.108° 2 After the chemical composite coating was heat-treated at 250°C, the coating appeared Cu 3 Stable phases such as P and Ni peaks, and form new CuP2 、NiP 2 Mutually.

[0045] The antibacterial test shows that when the chemical composite coating is irradiated by ultraviolet light, it has excellent photocatalytic performance and the degradation rate is obvious. With the prolongation of photocatalysis time, the decolorization r...

Embodiment 1

[0048] The first step is the pretreatment of the base AZ91D magnesium alloy.

[0049] Sanding - Acetone Cleaning - Alkaline Cleaning - Pickling - Activation.

[0050] The second step is to configure the chemical plating solution.

[0051] Nickel sulfate content 30g / L; sodium hypophosphite content 25g / L; citric acid content 18g / L; ammonium bifluoride content 15g / L; thiourea 0.5mg; sodium lauryl sulfate 0.02g / L; copper sulfate content 0.2 g / L, Nano TiO 2 4g·L -1 .

[0052] The third step is electroless plating.

[0053] Immerse the substrate AZ91D magnesium alloy pretreated in the first step into the plating solution configured in the second step, and use a magnetic stirrer to evenly disperse the nano-TiO in the plating solution 2 Powder, the electroless plating temperature is 85°C, the pH is 7, and the plating is performed for 2 hours.

[0054] The plating speed of electroless plating is 0.22706mg.mm -2 .h -1 .

[0055] The fourth step is to seal the hole.

[0056] M...

Embodiment 2

[0065] The composition of the plating solution in Example 1 was adjusted, and the rest of the steps were the same, and the bacteriostatic rate test of the chemical composite coating was continued. Wherein the bath composition contains in every liter bath: nickel sulfate content 12g / L; sodium hypophosphite content 11g / L; citric acid content 27g / L; ammonium bifluoride content 8g / L; thiourea 1.2mg; Sodium sulfate 0.05g / L; copper sulfate content 0.08g / L, nano TiO 2 6g·L -1 . The test results show that the composite coating has excellent photocatalytic performance, and TiO 2 The photocatalytic effect of the powder is comparable, which is TiO 2 The powder has found a carrier that can increase the reusability of antibacterial properties, which is the perfect combination of antibacterial technology and electroless plating technology. In the comparison of different times, the longer the contact time between the coating and the bacteria, the more significant the antibacterial effec...

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Abstract

The invention discloses a preparation method of a Ni-Cu-P/nano TiO2 chemical composite coating on the surface of a magnesium alloy. In the method, chemical plating is carried out on the substrate magnesium alloy; the selected plating solution comprises the following components: nickel sulfate, sodium hypophosphite, citric acid, ammonium bifluoride, thiourea, lauryl sodium sulfate, copper sulfate and nano TiO2. The Ni-Cu-P/nano TiO2 chemical composite coating with obvious bacteriostasis is prepared through reasonably setting a chemical plating technology and conditions; the antibacterial rate of the composite coating is up to above 90%; the composite coating has excellent photocatalytic property, corresponds with the catalysis of the TiO2 powders, finds a carrier for the TiO2 powders, can improve repeated use rate of antibacterial property, and is a perfect combination of an antibacterial technology and the chemical plating technology.

Description

technical field [0001] The invention belongs to the technical field of preparation of composite coatings in materials science, and specifically refers to a Ni-Cu-P / nano-TiO on the surface of a magnesium alloy. 2 Preparation method of chemical composite coating. Background technique [0002] In the diversified chemical plating, there are many studies on Ni-Cu-P electroless plating, such as reference [1]: Ma Zhuang, Wang Chen, Li Zhichao. Research on wear resistance of Ni-Cu-P ternary alloy electroless plating on magnesium alloy[ J]. Electroplating and Finishing, 2008, 30(5): 4~6. References [2]: Ma Zhuang, Wang Fu, Li Zhichao. Copper content on the performance of electroless Ni-Cu-P coatings on magnesium alloys [J]. Surface Technology, 2008, 37(1): 34-36. References [3]: [6] Ma Zhuang, Wang Fu, Li Zhichao. Study on Corrosion Resistance of Ni-Cu-P Ternary Alloy Electroless Plating on Magnesium Alloy [J]. New Technology and New Technology, 2008, (3): 85~ 87. However, all st...

Claims

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Application Information

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IPC IPC(8): C23C18/50
Inventor 马壮董世知李智超
Owner LIAONING TECHNICAL UNIVERSITY
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