Leakage testing liquid preventing low-temperature icing and preparation method

Abstract

The invention provides a low-temperature icing preventing leakage detecting solution and the preparing method. The invention aims at solving the problem that leakage detecting solution ices. The invention is prepared by the matters of the following weight units: anhydrous calcium chloride 4-7, vesicant 5-7, distilled water 50-60. The vesicant is one or multifold combination which are selected fromcoconut oleic acid diethyl alcohol amide, cherry bay radical acylamide propyl lycine, coconut oleic radical acylamide propyl lycine, dodecyl dimethyl betaine and dodecyl dimethyl amine oxide. The invention does not ice within 3 hours at 18 DEG C below zero, has fine foaming effect, can meet the requirements on the leakage detecting solution in field task or in the condition of 18 DEG C below zero.

Description

technical field [0001] The invention relates to a substance used for airtightness inspection, in particular to a leak test liquid for airtightness inspection under subzero temperature conditions. Background technique [0002] A simple and practical method for testing the airtightness of sealed containers or pipelines is to pressurize the inside of the test object (or use the pressure gas in the container or pipeline), and spray foaming liquid on the place to be tested. If there is a leak, the gas will cause the sprayed liquid to foam at the leak. This foaming liquid is called a leak test liquid. At present, the leak test liquid used is an aqueous solution with water as the base and chemical reagents. This common leak test liquid will freeze under subzero temperature conditions, which will cause the common leak test liquid to fail to work normally in winter field operations in cold regions. Therefore, it is difficult to carry out air tightness testing of sealed containers or...

AI Technical Summary

Problems solved by technology

At present, the leak test liquid used is an aqueous solution with water as the base and chemical reagents. This common leak test liquid will freeze under subzero temperature conditions, which will cause the common leak test liquid to fail to work normally in winter field operations in cold regions. This makes it difficult to test the airtightness of sealed containers or pipelines in this special environment