阅读说明：本技术 一种添加石墨烯的超声无损检测耦合剂 (Graphene-added ultrasonic nondestructive testing coupling agent ) 是由 毛汉领 易晓旭 赵淳 覃小倩 黄振峰 李欣欣 于 2019-04-18 设计创作，主要内容包括：本发明提供了一种添加石墨烯的超声无损检测耦合剂。该耦合剂按质量百分比计,包含溶剂10-40％、胶凝剂1-3％、胶体稳定剂1-3％、水溶性防锈剂0.02-2％、石墨烯0.05-2％,余量为水。该超声无损检测耦合剂具有良好的声学特性、防锈蚀性能,同时,可以优化耦合效果,提高超声波传导效率,以获得准确的检测结果。此外,就传统超声无损检测工业耦合剂而言,粘稠度较低,流动性较大,传感器探头在检测过程中容易滑动,导致检测结果出现偏差。石墨烯的添加可以平衡耦合剂的粘稠度,使得检测结果更加准确可信。(The invention provides an ultrasonic nondestructive testing coupling agent added with graphene. The coupling agent comprises, by mass, 10-40% of a solvent, 1-3% of a gelling agent, 1-3% of a colloid stabilizer, 0.02-2% of a water-soluble antirust agent, 0.05-2% of graphene, and the balance of water. The ultrasonic nondestructive testing couplant has good acoustic characteristics and corrosion resistance, can optimize the coupling effect and improve the ultrasonic conduction efficiency so as to obtain an accurate testing result. In addition, as for the traditional industrial couplant for ultrasonic nondestructive testing, the viscosity is low, the fluidity is high, and a sensor probe is easy to slide in the testing process, so that the testing result is deviated. Due to the addition of the graphene, the viscosity of the coupling agent can be balanced, so that the detection result is more accurate and credible.)

1. An ultrasonic nondestructive detection coupling agent added with graphene is characterized by comprising 10-40% of solvent, 1-3% of gelling agent, 1-3% of colloid stabilizer, 0.02-2% of water-soluble antirust agent, 0.05-2% of auxiliary agent and the balance of water.

2. The graphene-added ultrasonic nondestructive testing coupling agent according to claim 1, wherein the auxiliary agent according to claim 1 is graphene.

Technical Field

The invention relates to the field of nondestructive testing, in particular to an ultrasonic nondestructive testing coupling agent added with graphene.

Background

When ultrasonic nondestructive testing is used for detecting and detecting flaws, an air layer exists between a probe and the surface of a piece to be tested, so that part of ultrasonic waves are reflected and cannot enter the piece to be tested. Therefore, in order to enable the coupling agent to smoothly penetrate into a test piece to be tested, a layer of ultrasonic nondestructive testing coupling agent is required to be coated on the surface to be tested of the test piece or a probe, and the coupling agent is mainly used for removing an air layer between the probe and the surface to be tested of the test piece.

The existing ultrasonic nondestructive detection coupling agent mainly comprises engine oil, lubricating oil, glycerin, water glass, a special ultrasonic nondestructive detection coupling agent, chemical paste and the like. At present, the couplant which is most widely applied is engine oil, but when the engine oil is used as the couplant, the couplant is sensitive to sound contact pressure, and when the pressure applied to the probe is different, the amplitude change of the received ultrasonic echo is obvious.

The special ultrasonic nondestructive detection couplant has the advantages of low viscosity and high flowability, and is inconvenient to fix and detect, unfavorable for detection stability and easy to cause errors when a sensor is longitudinally placed. Meanwhile, the couplant is sensitive to the change of sound contact pressure, and when the pressure applied to the probe is different, the amplitude change of the received ultrasonic echo is obvious.

The ultrasonic nondestructive detection couplant with good detection effect mostly depends on import and is generally expensive.

The detection stability of the existing special ultrasonic nondestructive detection couplant is not good enough, and particularly for nondestructive detection flaw detection, the sound wave attenuation is obvious, so that the couplant is not beneficial to nondestructive detection.

Disclosure of Invention

Aiming at the technical defects of the ultrasonic nondestructive detection couplant, the high-strength characteristic of graphene is fully utilized, and the coupling rigidity is effectively improved, so that the acoustic wave conduction efficiency can be improved, and more ultrasonic waves can be transmitted into a workpiece to be detected; meanwhile, the strength of the coupling agent can be improved, and the fluidity of the coupling agent is reduced, so that the aim of optimizing ultrasonic nondestructive testing flaw detection is fulfilled.

The technical scheme of the invention is as follows: and adding graphene into the ultrasonic nondestructive testing couplant. The graphene is the substance with the highest strength, has good mechanical properties and excellent conductivity, and the visible light transmittance of the single-layer graphene is 97.7%.

The graphene is added, so that the attenuation of an acoustic signal can be effectively reduced, the matching degree with a detected workpiece is improved, and the acoustic transmittance of ultrasonic nondestructive detection is enhanced, so that the detection effect of the ultrasonic nondestructive detection is improved, and the application of the ultrasonic nondestructive detection in the field of nondestructive detection is facilitated.

Detailed Description

Aiming at the defects of the prior art, the invention improves the transmission rate of ultrasonic waves and optimizes the ultrasonic nondestructive testing technology by adding graphene into the conventional special couplant for ultrasonic nondestructive testing.

The method for achieving the above object is as follows:

the invention provides an ultrasonic nondestructive inspection flaw detection couplant with better performance, which comprises the following components: 10-40% of solvent, 1-3% of gelling agent, 1-3% of colloid stabilizer, 0.02-2% of water-soluble antirust agent, 0.05-2% of auxiliary agent and the balance of water.

Preferably, the solvent consists of methanol, ethyl acetate and ethanol.

The ethanol is selected from one or more of absolute ethanol, ethanol with a concentration of 95% or industrial ethanol with a concentration of 99.9%.

The gelling agent is one or more selected from carbomer, calcium alginate, light methyl cellulose, light methyl cellulose or light methyl cellulose sodium.

Preferably, the gelling agent is a carbomer.

Preferably, the colloidal stabilizer is aqueous polyurethane.

Preferably, the water-soluble antirust agent is an alcohol amine compound.

Preferably, the auxiliary agent is graphene.

The invention is further described below with reference to the following examples:

the experimental procedures in the following examples are conventional unless otherwise specified. The raw materials and reagent materials used in the following examples are all commercially available products unless otherwise specified.

An ultrasonic nondestructive detection coupling agent added with graphene comprises a solvent composed of 35% of methanol, ethyl acetate and ethanol, 2% of a gelling agent, 2% of a colloid stabilizer, 1% of a water-soluble antirust agent, 1% of graphene and the balance of distilled water.