Quick couplant that eliminates the effect of end surface roughness and improves the test effect of longitudinal and transverse waves

Abstract

The invention discloses a rapid coupling agent for eliminating end surface roughness influence and improving testing effects of vertical and horizontal waves. The coupling agent is prepared into a powder material from materials such as gypsum, calcined gypsum, polyvinyl alcohol, white emulsion, potassium sulfate, sodium chloride, calcium oxide and magnesium chloride according to certain procedures, the powder material is stored in a sealing bag for later use, when being used, the powder material is mixed with water, the surface of a tested article is coated with the sufficiently mixed powder material, and an ultrasonic probe is also mounted for ultrasonic testing. The coupling agent is in a flowing molding state in an ultrasonic testing pretreatment procedure, a gap between the probe and the end surface of the tested article can be sufficiently filled, and the influence on the ultrasonic testing caused by the roughness of the end surface is eliminated. In ultrasonic wave testing, the coupling agent is in a hard molding state and has appropriate adhesion strength, so that the ultrasonic probe can be integrally adhered to the tested article, and then a relatively good vertical and horizontal wave testing effect can be obtained. In addition, the reaction mass of the materials can be calculated through chemical reaction equations, the coupling agent can be approximately neutral, and the corrosion of the tested article to the probe is alleviated.

Description

technical field [0001] The invention relates to the field of ultrasonic testing such as detection and flaw detection of rocks, concrete, and steel structures, and in particular to a coupling agent that eliminates the influence of end surface roughness and improves the test effect of longitudinal and transverse waves. Background technique [0002] As one of the main exploration methods of geophysical exploration, ultrasonic detection technology is widely used in rock mass engineering property identification, integrity judgment, coal field and oil field exploration and other fields. At the same time, ultrasonic detection technology is also widely used in industrial and civil construction industries, such as non-destructive testing of concrete, steel structures and other materials. However, ultrasonic waves cannot penetrate the air between the ultrasonic probe and the measured object, so the transducer and the measured object must be protected by coupling. At present, the use ...

AI Technical Summary

Problems solved by technology

Although these liquid couplants can pass through longitudinal waves, they cannot pass through shear waves; while solid couplants are poorly coupled under low stress conditions

In addition, the acoustic wave test has high requirements on the flatness of the end surface of the measured object, which cannot be widely applied to the test of different end surface roughness

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