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Measuring device and operation method for coating internal stress

A technology for measuring devices and operating methods, applied in hydraulic/pneumatic metering, cells, electrolytic components, etc., to achieve the effects of improved electroplating performance, simple structure, and easy operation

Active Publication Date: 2021-12-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention aims at the deficiencies of the existing methods for measuring the internal stress of the coating, and provides a measurement device and operation method for the internal stress of the coating

Method used

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  • Measuring device and operation method for coating internal stress
  • Measuring device and operation method for coating internal stress
  • Measuring device and operation method for coating internal stress

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A circular sample of copper material with a thickness of 0.5 mm and a diameter of 30 mm is used as the cathode 4 to electroplate Watt nickel, and measure the change curve of the internal stress of the coating during the electroplating Watt nickel process.

[0046] (1) Set the temperature of the plating solution and the working solution to 55°C, turn on the camera 12 and the computer 2, adjust the electrode plate 14 so that the distance between the anode plate 5 and the cathode 4 is 5cm, and set the camera 12 to take pictures at a time interval of 0.5s , prepare the copper sample for pretreatment;

[0047] (2) Quickly clamp the sample, check whether the working fluid is full from the liquid replenishment port 20, connect the anode plate 5 and the cathode 4 to the positive and negative poles of the power supply device 1 respectively, turn on the power supply device 1, and set the current to 0.2A, Plating time is 20min;

[0048] (3) The internal stress generated by electr...

Embodiment 2

[0050] A steel material, a square sample with a thickness of 0.1mm and a side length of 40mm is used as the cathode 4, electroplated with hexavalent chromium, and measuring the change curve of the internal stress of the coating during the chromium electroplating process.

[0051] (1) The temperature of the plating solution and the working solution is set to 50°C, the camera 12 and the computer 2 are turned on, the electrode plate 14 is adjusted so that the distance between the anode plate 5 and the cathode 4 is 4.5 cm, and the time interval of taking pictures of the camera 12 is 0.5 cm. s, prepare the steel sample for pretreatment;

[0052] (2) Quickly clamp the sample, check whether the working fluid is full from the liquid replenishment port 20, connect the anode plate 5 and the cathode 4 to the positive and negative poles of the power supply device 1 respectively, turn on the power supply device 1, and set the current to 0.4A, Plating time is 40min;

[0053] (3) The intern...

Embodiment 3

[0055] Electroless copper plating is carried out on a plastic circular material sample with a thickness of 0.05mm and a diameter of 25mm, and the change curve of the internal stress of the coating during the electroless copper plating process is measured.

[0056] (1) The temperature of the plating solution and the working solution is set to 45° C., the camera 12 and the computer 2 are turned on, the camera 12 is set to take pictures at a time interval of 0.5 s, and the plastic sample is prepared for pretreatment;

[0057] (2) Quickly clamp the sample, check whether the working fluid is full from the liquid replenishment port 20, without turning on the power supply device 1, without connecting the positive and negative electrodes of the power supply device 1, and the electroplating time is 50 minutes;

[0058] (3) The internal stress produced by the electroless plating deforms the substrate. The camera 12 monitors the liquid level of the capillary 10. After processing by the so...

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Abstract

The invention provides a measuring device and an operation method for coating internal stress, which belong to the technical field of internal stress detection. The device includes: power supply unit, which provides voltage for electroplating; electroplating device, including plating tank, anode plate, cathode, etc.; automatic temperature control device, including temperature control box, heating tube, thermocouple, etc., providing constant temperature for plating solution and working solution Environment; stress measurement device, including working cavity, capillary, etc.; bracket; camera, to monitor the scale of capillary liquid level; computer, to automatically read the change value of capillary liquid level scale in the photo provided by the camera, and convert the electrical signal through software processing is the internal stress value, and finally displayed as the curve of the internal stress of the coating changing with time. The invention has the advantages of simple structure, convenient portability, convenient operation, accurate detection result and no damage to the plating layer.

Description

technical field [0001] The invention relates to the field of internal stress detection, in particular to a measuring device and an operation method for coating internal stress. Background technique [0002] Metal components used in industries such as precision instruments, chemicals, transportation, weapons, aerospace, and atomic energy will be corroded by corrosive media in certain environments. The latter material has a wider range of applications. With the expansion of the scope of application of electroplating in various fields of the national economy, higher and higher requirements are placed on the performance of the electroplating layer. Due to the existence of internal stress in the coating, the coating may produce cracks, bubbling or peeling, or even deformation, which may also reduce the fatigue strength of the substrate, causing stress corrosion in the coating, and the internal stress in the coating will affect the performance of the coating. adverse effects. U...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/02C25D21/12
CPCG01L1/02C25D21/12
Inventor 张津杨竞涵焦进超徐伟生丁啸云连勇
Owner UNIV OF SCI & TECH BEIJING
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