Chemical nickel plating front activating process for titanium and titanium alloy surface

A surface chemistry, titanium alloy technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve problems such as no literature reports

Inactive Publication Date: 2007-08-15
DAQING GASOLINEEUM INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no literature reports at home and abroad on the introduction of ultrasound in the activation process before electroless nicke

Method used

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  • Chemical nickel plating front activating process for titanium and titanium alloy surface
  • Chemical nickel plating front activating process for titanium and titanium alloy surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Take the surface area of ​​12cm 2 There are 12 pieces of TA2 titanium plates.

[0055] 1. Substrate pretreatment;

[0056] 2. Preparation of activation solution: take 1.2mL HF (40% mass concentration), 0.5g ZnSO 4 ·7H 2 O, 0.8 mg CH 3 (CH 2 ) 14 CH 2 (CH 3 ) 3 NBr was added to distilled water to prepare 40mL activation solution (to ensure that the substrate can be fully immersed), and two copies were prepared in the same way;

[0057] 3. Activation: Divide the 12 substrates that have been pretreated into 2 groups on average, select one group for ultrasonic activation (frequency 40KHz, power 250W), and the other group for non-ultrasonic activation, each group selects a different activation time , to detect the quality change of the substrate under the above conditions and the corresponding electroless plating deposition rate, as shown in Table 1:

[0058] Table 1

[0059] activation time

[0060] 15

Embodiment 2

[0062] Take the surface area of ​​12cm 2 3 pieces of TA2 titanium plates.

[0063] 1. Substrate pretreatment;

[0064] 2. Preparation of activation solution: take 0.8mL HF (40% mass concentration), 0.6g ZnSO 4 ·7H 2 O, 0.8 mg CH 3 (CH 2 ) 14 CH 2 (CH 3 ) 3 NBr was added to distilled water to prepare 40mL activation solution (to ensure that the substrate can be fully immersed), and three copies were prepared in the same way;

[0065] 3. Ultrasonic activation: Put the prepared activation solution into ultrasonic cleaning machine 1 (Kunshan Ultrasonic Instrument Co., Ltd., Jiangsu Province, KQ-250E), select ultrasonic frequency 40KHz, power 250W; ultrasonic cleaning machine 2 (Shandong Jining Hengtong Ultrasonic Electronic Equipment Company, HT-200), select ultrasonic frequency 25KHz, power 200W; ultrasonic cleaning machine 3 (Shandong Jining Hengtong Ultrasonic Electronic Equipment Company, HT-150), select ultrasonic frequency 40KHz, power 150W; The substrates were put...

Embodiment 3

[0070] Take the surface area of ​​12cm 2 3 pieces of TA2 titanium plates.

[0071] 1. Substrate pretreatment;

[0072] 2. Preparation of activation solution: take 1.2mL HF (40% mass concentration), 0.5g ZnSO 4 ·7H 2 O, 0.8 mg CH 3 (CH 2 ) 14 CH 2 (CH 3 ) 3 NBr was added to distilled water to prepare 40mL activation solution (to ensure that the substrate can be fully immersed), and three copies were prepared in the same way;

[0073] 3. Ultrasonic activation: put the prepared activation solution into the container and then put them into the ultrasonic cleaning machine respectively; respectively select the ultrasonic frequency 40KHz, power 250W; ultrasonic frequency 40KHz, power 200W; ultrasonic frequency 59KHz, power 250W; The treated substrates were put into the activation solution and activated at room temperature for 10s; 15s; 10s respectively. After activation, the surface of the substrate has no metallic luster and is gray-black;

[0074] 4. Washing: conventiona...

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Abstract

The invention discloses a disposing method of titanium and titanium alloy surface, which is characterized by the following: introducing supersonic wave to available activating craft; finishing the activation under the condition of ultrasonication; decreasing the usage of malignancy noxious pests HF in activating liquid; shorting the time of activating time; decreasing the quantity of dissolvable; extending the period of usage of activating liquid; simplifying the craft; increasing the mass transfer coefficient of buffer zinc layer; improving the arrangement of active component zinc layer; improving the deposition rate of coating; enhancing the cohesion of coating and basal body.

Description

Technical field: [0001] The invention relates to a surface treatment method for titanium and titanium alloys, in particular to an activation process before electroless nickel plating. Background technique: [0002] As light metals with strong activity, titanium and titanium alloys are easy to form a dense oxide film in the air, which makes the chemical coating and the substrate not well bonded, the deposition rate is low, and the quality and performance of the coating are affected. To obtain an electroless coating with high deposition rate, strong binding force and excellent performance on the surface of titanium and titanium alloy substrates, the activation process is the key to success and is also a research hotspot. Sharma et al. (Sharma A K, Bhojaraj H. Electroless nickel and gold plating on titanium alloys for space applications [J]. Metal Finishing, 1992, 90 (7), 23-26) reported electroless nickel plating on titanium alloy (Ti6Al4V) And the process of gold plating on ...

Claims

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Application Information

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IPC IPC(8): C23C18/18C23C18/32
Inventor 范洪富张翼闫红娟刘振雷王磊
Owner DAQING GASOLINEEUM INST
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