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A technology of contrast enhancer and volatile solvent, applied in the direction of coating, material magnetic variable, etc., can solve the problems of reducing flaw detection sensitivity, difficulty in cleaning, pollution, etc., and achieve the effect of improving flaw detection sensitivity, easy cleaning, and uniform leveling
Pending Publication Date: 2021-11-23
WUJIANG HYPERD NDT MATERIAL
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[0004] However, existing contrast enhancers
The formed film is thicker, and it is easy to form processing at tiny defects, thereby reducing the sensitivity of flaw detection, and it is difficult to remove, which has certain pollution to the environment
Method used
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Embodiment 1
[0029] A contrast enhancer comprising the following components by weight percentage:
[0030] The mixture of titanium dioxide, magnesium oxide and zinc oxide powder, 15 parts, the weight ratio of titanium dioxide, magnesium oxide and zinc oxide powder is 1:1:1.
[0031] 3 parts fluorescent whitening agent
[0032] Volatile solvent ethanol, dioctyl phthalate and n-pentane 75 parts
[0033] 1 part of the mixture of ethyl cellulose ether and rosin resin, the weight ratio of ethyl cellulose ether and rosin resin is 1:1.
[0034] 30 parts of T-306 environmental solvent.
Embodiment 2
[0036] A contrast enhancer comprising the following components by weight percentage:
[0037] The mixture of titanium dioxide, magnesium oxide and zinc oxide powder, 20 parts, the weight ratio of titanium dioxide, magnesium oxide and zinc oxide powder is 1:1:1.
[0038] Fluorescent whitening agent 5 parts
[0039] Volatile solvent ethanol, dioctyl phthalate and n-pentane 78 parts
[0040] The mixture of ethyl cellulose ether and rosin resin is 2 parts, and the weight ratio of ethyl cellulose ether and rosin resin is 1:1.
[0041] 40 parts of T-306 environmental solvent.
[0042] The preparation method of above-mentioned contrast enhancing agent, comprises the steps:
[0044] Step 2. Put the mixture A obtained in step 1 into a grinder for grindin...
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Abstract
The invention discloses a contrast enhancer which comprises the following components in percentage by weight: 15-20 parts of a mixture of titanium dioxide, magnesium oxide and zinc oxide powder, 3-5 parts of a fluorescent whitening agent, 75-80 parts of a volatile solvent, 0.5-2 parts of a mixture of ethyl cellulose ether and rosin resin, and 30-50 parts of a T-306 environment-friendly solvent. The contrast enhancer provided by the invention is used for magnetic powder inspection, can be used for enhancing the contrast ratio when a workpiece cannot obtain a good background due to corrosion, is thin and uniform in spraying, is dry after being sprayed, can effectively provide a good background contrast ratio, is pure white in color and luster and thin in formed film, has the thickness of less than 1 micron, does not affect the adsorption force of a leakage magnetic field, is uniform in leveling and strong in seepage adhesion force, cannot form overhead so as to improve flaw detection sensitivity, is easy to clear, and cannot pollute the environment.
Description
technical field [0001] The invention relates to a contrast enhancing agent used for magnetic particle flaw detection. Background technique [0002] Magnetic particle testing is one of the five conventional non-destructive testing (penetrant testing, magnetic particle testing, radiographic testing, ultrasonic testing, eddy current testing) methods. The principle of magnetic particle testing is that after the ferromagnetic material and the workpiece are magnetized, due to the existence of discontinuity, the magnetic field lines on the surface and near the surface of the workpiece will be locally distorted to generate a leakage magnetic field, which will absorb the magnetic powder applied on the surface of the workpiece and form it under suitable light. A visual indication showing the location, shape and size of a discontinuity. It has the following advantages: intuitively display the position, shape, size, and severity of defects; high detection sensitivity, the width can rea...
Claims
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Application Information
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