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Hydraulic pressure welding seam quick leak-checking agent and preparation method thereof

A leak detection agent, rapid technology, applied in the direction of detecting the presence of fluid at the leak point, optical testing flaws/defects, liquid tightness measurement using liquid/vacuum degree, etc., can solve the problem that the surface of the leak detection agent falls off and cannot be accurately Judging problems such as water seepage in the weld seam and external splashing water, color rendering is not obvious, etc., to achieve the effect of good adhesion, fast and accurate judgment, and obvious color

Inactive Publication Date: 2007-10-17
CSIC NO 12 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a rapid leak detection agent for hydraulic welds, which solves the problems that the existing leak detection agent is easy to fall off from the surface, the color development is not obvious, and it is impossible to accurately judge the water seepage in the weld seam and the external splash water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 65% ethanol by mass to the intermittent sand mill, start the sand mill, first add 0.18% polyvinyl butyral by mass percentage, dissolve, then add 33.5% light magnesium oxide, 0.10% Thymol blue, 1.22% anti-sedimentation agent, ground for 30 minutes until uniform and free of particles.

Embodiment 2

[0027] Add 70% ethanol by mass percentage into the intermittent sand mill, start the sand mill, first add 0.13% polyvinyl butyral according to the mass percentage, dissolve, then add 28.5% light magnesium oxide, 0.15% polyvinyl butyral in sequence Thymol blue, 1.22% anti-sedimentation agent, ground for 40 minutes until uniform and free of particles.

Embodiment 3

[0029] Add 68.2% ethanol by mass percentage into the intermittent sand mill, start the sand mill, first add 0.15% polyvinyl butyral according to the mass percentage, dissolve, then add 30% light magnesium oxide, 0.15% Thymol blue, 1.5% anti-sedimentation agent, ground for 35 minutes until uniform and free of particles.

[0030] The invention is used for qualitative inspection of penetrating weld seam defects determined by water pressure. After injecting water into the object to be tested, the present invention is coated on the outer surface of the weld, the dry film is yellow, and the coating becomes wet with water, and the wet film is blue, indicating that there is a crack in the weld, and the color contrast is obvious, and can be quickly Accurately judge weld defects.

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PUM

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Abstract

The invention discloses a hydraulic pressure welding seam fast leak detection agent, which contains constituents of (mass percent): ethanol of 65-70%, poly(vinyl butyral) of 0.13-0.18%, light magnesium oxide of 28.5-33.5%, thymol blue of 0.10-0.15%, and anti-precipitation agent of 1.22-1.5%. Preparation method for the leak detection agent includes steps: adding ethanol into a intermittent sand mill, actuating the sand mill, firstly adding poly(vinyl butyral), and then adding light magnesium oxide, thymol blue and anti-precipitation agent, grinding the mixer until no particle, and obtaining the leak detection agent. Advantages of the invention are: drying of coating is fast, adhesive force is good, color contrast is obvious, color change of water seepage in welding seam and outside spitting water can be differentiated, and estimation effect is fast and exact.

Description

technical field [0001] The invention belongs to the technical field of chemical products, and relates to a leak detection agent, in particular to a chemical leak detection agent for judging penetrating weld defects, and also relates to a preparation method of the leak detection agent. Background technique [0002] Penetrating weld defects usually exist in the current welding technology, so it is necessary to find a chemical leak detection agent for penetrating weld defects. There is no chemical leak detector in China that is coated on the surface of the weld and qualitatively judges the defects of the penetrating weld through water injection and pressure. Japanese technology mainly adds inorganic powder, color developer, volatile or non-volatile solvent, and judges the solder leak by changing the color to red or green. It is impossible to accurately judge the problem of water seepage in the weld and external splash water. Contents of the invention [0003] The purpose of...

Claims

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Application Information

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IPC IPC(8): G01N21/91G01M3/20
Inventor 王通平王华张剑青李海军任朋立
Owner CSIC NO 12 RES INST
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