Nuclear grade ultrasonic inspection couplant and preparation method thereof

Abstract

The invention relates to nuclear grade ultrasonic inspection couplant, which is characterized by comprising the following components in parts by weight: 50-90 parts of deionized water, 0.3-5 parts of gel matrix, 0.3-8 parts of pH value modifier, 5-30 parts of moisturizing agent, 1-10 parts of anti-rusting agent and 0.1-11 parts of antibacterial preservative. The invention also provides a preparation method of the nuclear grade ultrasonic inspection couplant. The nuclear grade ultrasonic inspection couplant has low content of fluorine, chlorine and sulfur and has the advantages of having no toxicity or harm, pure and transparent appearance, no bubble, adjustable viscosity, good anti-rust capability, stable storage, good sound transparent performance and the like, and is easy to clear.

Description

technical field [0001] The invention relates to a nuclear-grade ultrasonic flaw detection coupling agent and a preparation method thereof, which are used for coupling an ultrasonic probe and a workpiece to detect workpiece defects, and belong to the technical field of nondestructive testing ultrasonic flaw detection. Background technique [0002] Ultrasonic testing is one of the five conventional non-destructive testing methods (penetrant testing, magnetic particle testing, radiographic testing, ultrasonic testing, eddy current testing) to detect defects in workpieces. Like other non-destructive testing methods, ultrasonic testing is based on the premise of not destroying the object to be tested, and effectively inspects various engineering materials, parts and products to evaluate their integrity, continuity, safety and reliability. Ultrasonic testing is an important means to ensure product quality and use safety in product manufacturing and maintenance. [0003] Ultrasoni...

AI Technical Summary

Problems solved by technology

Using water as coupling agent: it is easy to make the workpiece rust, and the viscosity of water is too small to coat on the workpiece, so the ultrasonic probe and the workpiece can only be immersed in water for operation; using glycerin as coupling agent: the viscosity of glycerin increases with temperature The change of viscosity is relatively large, and the viscosity range from 20°C to 50°C is 1412mPa·S to 142mPa·S. When the temperature is low, it can barely be coated on the vertical surface. When the temperature is high, it can be coated on the upward and vertical surfaces. It will flow, and the effect of coupling cannot be achieved; use engine oil as coupling agent: it cannot be used for coating on the back and facade, and the follow-up cleaning work is more troublesome. The engine oil is mineral oil, which does not meet the current environmental protection requirements; As a coupling agent: it can be applied on the vertical and upward surfaces, but the follow-up cleaning work is troublesome; using carboxymethyl cellulose as a coupling agent: although the viscosity can be adjusted according to different needs, there are fine air bubbles that are difficult to eliminate, and the existence of air bubbles The coupling effect will be greatly reduced

[0008] The content of fluorine, chlorine and sulfur in the existing ordinary ultrasonic coupling agent is not specially controlled, so it cannot meet the requirements of the nuclear industry