Leakage testing liquid with high leakage detecting sensitivity and easy removal and preparation method thereof

Abstract

The invention relates to leakage testing liquid with high leakage detecting sensitivity and easy removal and a preparation method thereof, in particular to leakage testing liquid which needs air tightness testing in the long-time storage environment after leakage testing, belonging to the technical field of air tightness testing. The leakage testing liquid comprises the following components in percentage by weight: 3-10 percent of glue, 3-10 percent of glycerol, 5-10 percent of sodium nitrite, 30-40 percent of foaming agent and the balance of water, and the components add up to 100 percent. The leakage testing liquid has high leakage detecting sensitivity for a closed container, and the leakage detecting efficiency can be increased particularly to low-permeability parts. After leakage testing, the surface of the container can generate a passivating layer which plays a role of anti-corrosion for the surface, and the surface cannot rust within 7-day open storage ( except for being exposed to the rain). After the leakage testing liquid is used for sandblasting, the surface does not have a leakage testing liquid trace, and the quality of follow-up spraying can be increased. In addition, the leakage testing liquid does not have waste residues, waste water and waste gas and has simple components and low cost.

Description

technical field [0001] The invention relates to a leak test liquid with high leak detection sensitivity and easy removal and a preparation method, in particular to a leak test liquid which needs to be stored for a long time in an environment for air tightness test after leak test, and belongs to the technical field of air tightness test. Background technique [0002] At present, people often use a simple and practical method for testing the airtight performance of sealed containers or pipelines, which is to pressurize the inside of the test object (or use the pressure gas in the container or pipeline), and spray foam on the place to be tested. Type liquid, if there is a leak, the gas will make the sprayed liquid foam at the leak. This foam type liquid is called a leak test liquid. Background Art The leak test liquid used is an aqueous solution with water as the base and chemical reagents. This leak test liquid is small and easy to break when leak testing, and it will stick t...

AI Technical Summary

Problems solved by technology

Background Art The leak test liquid used is an aqueous solution with water as the base and chemical reagents. This leak test liquid is small and easy to break when leak testing, and it will stick to the surface of the container if it is not cleaned within 2-3 days of leak detection. After the sanding treatment, there are traces of the leak test liquid, which leads to the decrease of the adhesion of the sprayed paint film, thus affecting the quality of the coating