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Application of Xanthan Gum as Non-Corrosive Couplant for Ultrasonic Flaw Detection of Steel Structures

A non-corrosive, xanthan gum technology, applied in the direction of material analysis, measuring devices, instruments, etc. using sound waves/ultrasonic waves/infrasonic waves, can solve the problems of inconvenient storage, large occupation, etc., to save flaw detection costs and low prices , The effect of convenient flaw detection operation

Active Publication Date: 2016-01-27
中冶检测认证(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Now many steel structure manufacturers have experienced the importance of non-corrosive ultrasonic flaw detection coupling agents in practice. Some factories use industrial paste CMC, engine oil, glycerin, and industrial detergent as ultrasonic flaw detection coupling agents, and the coupling effect is not bad. , but the cost is 2 yuan / kg, and it is liquid, so it is inconvenient to store, and it will take up a lot of space when purchased in large quantities

Method used

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  • Application of Xanthan Gum as Non-Corrosive Couplant for Ultrasonic Flaw Detection of Steel Structures

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Experimental program
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Effect test

Embodiment 1

[0040] The application of xanthan gum of the present invention as non-corrosive steel structure ultrasonic flaw detection coupling agent is a kind of biopolymer polysaccharide polymer of white or light yellow powder, molecular formula: (C 35 h 49 o 29 )n, CAS number: 11138-66-2. The application method is as follows: apply the aqueous solution containing the xanthan gum to the steel structure at normal temperature, and conduct ultrasonic flaw detection on the steel structure. The xanthan gum can be quickly dissolved in water at normal temperature, and has good fluidity. The pH value of the aqueous solution of xanthan gum is 7.0. The weight ratio of xanthan gum to water in the xanthan gum aqueous solution is 1:100, that is to say, a barrel of xanthan gum powder of 25 kg can be mixed with 2.5 tons of coupling agent. The market price of a barrel of xanthan gum is 700 yuan, and the cost after adding water is 0.3 yuan / kg. It produces good coupling between the probe and the workp...

Embodiment 2

[0045] The application of xanthan gum of the present invention as non-corrosive steel structure ultrasonic flaw detection coupling agent is a kind of biopolymer polysaccharide polymer of white or light yellow powder, molecular formula: (C 35 h 49 o 29 )n, CAS number: 11138-66-2. The application method is as follows: apply the aqueous solution containing the xanthan gum to the steel structure at normal temperature, and conduct ultrasonic flaw detection on the steel structure. The xanthan gum can be quickly dissolved in water at normal temperature, and has good fluidity. The pH value of the aqueous solution of xanthan gum is 7.0. The weight ratio of xanthan gum to water in the xanthan gum aqueous solution is 1:100, that is to say, a barrel of xanthan gum powder of 25 kg can be mixed with 2.5 tons of coupling agent. The market price of a barrel of xanthan gum is 700 yuan, and the cost after adding water is 0.3 yuan / kg. It produces good coupling between the probe and the workp...

Embodiment 3

[0050] Aqueous solution preparation method of xanthan gum

[0051] Xanthan gum is completely dissolved in the water-based phase system, but due to its strong hydrophilicity, if it is directly added to water without sufficient stirring, the outer layer absorbs water and swells into micelles, thereby preventing water from entering the inner layer, and then The play of influence. Because the solubility of xanthan gum and water is too strong, in the method of the present invention, xanthan gum should be dispersed into water. It is better to sprinkle the xanthan gum powder like pepper while stirring, so that it can be fully dissolved before use. .

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Abstract

The invention relates to an application of a xanthan gum as a corrosiveness-free steel structure ultrasound wave flaw detection coupling agent. The xanthan gum is a biomacromolecule polysaccharide polymer, and has a molecular formula of (C35H49O29)n and a CAS No of 11138-66-2. The application method comprises: coating a xanthan gum-containing aqueous solution on a steel structure member, and carrying out ultrasound wave flaw detection on the steel structure member, wherein a weight ratio of the xanthan gum to the water in the aqueous solution is 1:80-1:150, and the pH value is 6.0-8.0. According to the invention, the xanthan gum is adopted as the corrosiveness-free steel structure ultrasound wave flaw detection coupling agent, such that advantages of no corrosion, no damage, no stimulation, no sensitivity, no pollution, easy cleaning, low price, flaw detection cost saving, flaw detection engineering cost saving are provided.

Description

technical field [0001] The invention relates to a coupling agent for ultrasonic flaw detection of steel structures, in particular to the application of xanthan gum as a non-corrosive coupling agent for ultrasonic flaw detection of steel structures. Background technique [0002] In the field of steel structure processing, various heavy equipment, bridges, factory buildings, boiler frames, buildings, etc. require a lot of welding operations, many of which require 100% flaw detection for primary welds, so the workload of ultrasonic flaw detection is quite large. During ultrasonic flaw detection, the probe should not be in direct contact with the steel, and should be protected with couplant. Nowadays, chemical paste is widely used as coupling agent in steel structure manufacturing plants, because it is cheap, easy to store, does not take up space, and is ready to use. However, the chemical paste is alkaline and corrosive, and will penetrate deep into the steel to corrode. Alth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/28
Inventor 尹亮
Owner 中冶检测认证(上海)有限公司