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Magnetic powder inspection contrast intensifier and method for preparing the same

A technology of contrast enhancer and magnetic particle flaw detection, which is applied in the direction of material magnetic variable, etc., can solve the problems of affecting the processing of workpieces, affecting the ability of leakage magnetic field to absorb magnetic powder, and difficult to remove white paint film, so as to achieve the effect of easy cleaning

Inactive Publication Date: 2005-07-13
HUDONG ZHONGHUA SHIPBUILDINGGROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the chromatic aberration is enhanced, the white paint will form a thick film—it is a non-magnetic substance, which greatly affects the ability of the leakage magnetic field to absorb magnetic particles; The distance between them reduces the detection sensitivity; the white paint film is difficult to remove, which affects the introduction of the magnetizing current; the white paint film also affects the subsequent processing of the workpiece, such as anti-rust treatment, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Each raw material and corresponding weight percent are as follows:

[0029] ①Titanium dioxide 2 ④Polyvinyl acetal 1

[0030] ② Zinc oxide powder 3 ⑤ Butanol 22

[0031] ③ Fluorescent whitening agent 2 ⑥ Methyl ethyl ketone 70

Embodiment 2

[0033] ①Titanium dioxide 6 ④Polyvinyl acetal 4

[0034] ② Zinc oxide powder 8 ⑤ Butanol 40

[0035] ③ Fluorescent whitening agent 6 ⑥ Methyl ethyl ketone 36

Embodiment 3

[0037] ①Titanium dioxide 3 ④Polyvinyl acetal 3

[0038] ② Zinc oxide powder 5 ⑤ Butanol 32

[0039] ③ Fluorescent whitening agent 4 ⑥ Methyl ethyl ketone 53

[0040] The preparation and use method of above-mentioned embodiment:

[0041] (1) Weigh each raw material according to the above ratio, and mix each component in turn; (2) Then pour into a sand mill for grinding. The grinding particle size requirement can pass through the mesh screen of 320 holes to be regarded as qualified, and the finished product can be obtained after sieving; (3) brushing construction can fully shake the present invention, and then apply it with a brush; (4) spraying applicators, need The invention is poured into a pressure tank, and then propellant is added to make an aerosol product.

[0042] It has been proved by trial that the contrast enhancer for magnetic particle flaw detection of the present invention has white color, whiteness of more than 85, thin film formation, uniform leveling, strong...

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Abstract

A magnetic particle flaw detection contrast enhancer and a preparation method thereof, the components of which include: titanium dioxide: 2-6%, zinc oxide powder: 3-8%, fluorescent whitening agent: 2-6%, polyvinyl acetal: 1 ~4%, butanol: 22~40%, methyl ethyl ketone: 36~70%. The magnetic particle flaw detection contrast enhancer of the present invention has white color, thin film formation, uniform leveling, strong penetration, does not affect the leakage magnetic field adsorption force, is easy to clean afterwards, and has obvious enhancement effect on magnetic particle flaw detection after use.

Description

Technical field: [0001] The invention relates to metal surface coatings, in particular to a magnetic particle flaw detection contrast enhancer and a preparation method thereof, which can enhance the color contrast between magnetic powder traces and workpiece surfaces during magnetic particle flaw detection construction. Therefore, the sensitivity and reliability of the magnetic particle flaw detection are improved. Background technique: [0002] Magnetic particle testing is a non-destructive testing method widely used in modern industry. The applicable materials are ordinary carbon steel, alloy steel, special steel, etc., and any ferromagnetic material with a magnetic field greater than 800 Gauss will do. Magnetic particle inspection is a special inspection of surface and near-surface defects of these materials, such as cracks, hairlines, slag inclusions, folds, stress sensitive areas, segregation areas, etc. It plays an extremely important role in ensuring the safety of m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/84
Inventor 王建喜陈时宗
Owner HUDONG ZHONGHUA SHIPBUILDINGGROUP
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