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A Visual Analysis Method for Lubricating Fluid Injection Porous Surface Damage

A technology of porous surface and analysis method, applied in the direction of optical testing flaws/defects, etc., can solve the problems of limited application scenarios, fluid properties, easy loss of lubricating fluid, damaged surface properties, etc., to achieve the effect of speeding up the test rate

Active Publication Date: 2021-10-19
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because this surface is composed of lubricating fluid filled on the surface of the microstructure, its fluid nature will cause the lubricating fluid to be easily lost during use.
If the lubricating fluid on the surface is lost and cannot be replenished in time, the properties of the surface will be greatly damaged, which will greatly shorten the service life of this type of surface and limit its application scenarios

Method used

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  • A Visual Analysis Method for Lubricating Fluid Injection Porous Surface Damage
  • A Visual Analysis Method for Lubricating Fluid Injection Porous Surface Damage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A visual analysis method for lubricating fluid injected porous surface damage, including 5 steps:

[0041] Step 1: Dyeing of the water

[0042] Adjust the pH value of the water to between 2 and 12, add water-soluble dyes to the water so that the concentration of the dyes in the water is 0.001% to 5%, and stabilize the temperature of the aqueous solution at 0 to 50°C;

[0043] Step 2: Atomization

[0044] Atomize the dyeing water configured above, the temperature of the atomization chamber is 0-40°C, and the diameter of the atomized water droplets is controlled between 1 μm and 1 mm;

[0045] Step 3: Coverage of the droplet on the surface of the sample to be tested

[0046] Introduce the atomized water droplets around the sample to be tested, and the droplets will adhere to the surface of the sample after hitting the surface. 2μm~2mm, and avoid small droplets adhering to the sample surface from aggregating into large droplets;

[0047] Step 4: Freeze

[0048] Put th...

Embodiment 2

[0052] This example is basically the same as Example 1, except that the dye used in step 1 is 0.5% phenolphthalein, the pH value of the aqueous solution is adjusted to 9, and the indication of the color of the damaged area is that the surface color changes to bright red only in the center of the droplet A small amount of dark red, the area where the color changes is the surface damage area, and the area damage rate of the surface is about 20%;

[0053] Technical description of this embodiment: This embodiment uses an alkaline solution, so that some samples that cannot be tested in an acidic or neutral environment can be tested. This embodiment is suitable for surfaces tested in an alkaline environment, which expands its application range .

Embodiment 3

[0055] This example is basically the same as Example 1, except that the dye used in step 1 is 0.3% phenol red, the pH value of the aqueous solution is adjusted to 6, and the indication of the color of the damaged area is that the color changes from yellow to only in the center of the droplet The dark yellow, the color-changing area is the surface damage area, and the area damage rate of the surface is about 25%;

[0056] Technical description of this embodiment: This embodiment uses an acidic solution, so that some samples that are not suitable for testing in an acidic or neutral environment can be tested, and the application range of this method can be expanded.

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Abstract

The invention provides a visual analysis method for the damage of the lubricating liquid injected into the porous surface, comprising the following steps: dyeing the water; atomizing the dyed aqueous solution; making the dyed droplets uniformly cover the surface of the sample to be tested ; freeze the sample surface; observe and record the area where the color of the droplet changes to determine the area of ​​damage. The surface damage analysis method of the present invention is simple and convenient, has strong applicability, does not require large-scale instruments, and is low in cost. It is applicable to rapid and large-area analysis of damage caused by lubricating fluid injected into porous surfaces, and is expected to become a standardized analysis method for lubricating fluid injected into porous surfaces.

Description

technical field [0001] The invention relates to a visual analysis method for damage, in particular to a visual analysis method for the damage of lubricating fluid injected into porous surfaces. Background technique [0002] The lubricating fluid injected into the porous surface has good liquid repellency and compression resistance, so it has broad market application prospects in the fields of self-cleaning, anti-fog, anti-freezing, drag reduction, marine anti-fouling and anti-corrosion, and microfluidic control. But because this surface is composed of lubricating fluid filled on the surface of the microstructure, its fluid nature will cause the lubricating fluid to be easily lost during use. If the lubricating fluid on the surface is lost and cannot be replenished in time, the properties of the surface will be greatly damaged, thereby greatly shortening the service life of such surfaces and limiting their application scenarios. Therefore, in order to ensure the reliability ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/91
CPCG01N21/91
Inventor 陈蓉蓉严明龙王君张宏森刘琦刘婧媛于静张春红
Owner HARBIN ENG UNIV
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