PROCEDURE FOR DETERMINATION OF CHEMICAL RESISTANCE AND PERMEABILITY OF SAMPLES OF SPECIAL MATERIALS FOR PROTECTIVE CLOTHING TO AMMONIA

Abstract

One of the most harmful substances to human health in chemical production is liquid or gaseous ammonia, the remnants of which are faced by repairmen during cleaning, repair and other preventive work of closed tanks. Ammonia is the raw material of many chemical industries - in particular, nitrate acid and nitrogen fertilizers. Ammonia is a colorless gas with a characteristic pungent odor and pungent taste. Recently, liquefied ammonia and aqueous ammonia solution have become widely used directly as nitrogen fertilizer. This substance is stored and transported in a liquefied state in special tanks. As a liquid, ammonia is lighter than water, has a lower density and forms weak smoke in the air. At the same time, it is flammable, forms explosive mixtures with air, and is poisonous. Especially dangerous for the eyes and can cause severe damage to the airways and lungs, causing swelling with possible fatal consequences for humans.

Consequently, the development (improvement) of methods for studying the influence of ammonia on the protective properties of special-purpose materials is relevant in the development of an insulating suit for workers in chemical industries. Therefore, the authors of the publication formulated the following task: to develop a methodology for determining the permeability of samples of special materials in relation to the effects of liquid and gaseous ammonia.

In order to solve this problem, the authors of the publication proposed to improve research methods that already exist. In particular, it is proposed to add to the package of experimental materials an additional layer of cotton fabric, which is pre-treated with a special chemical solution. This additional layer should change its white color to blue in case ammonia passes through the layer of the base material. The article presents the results of selection of the composition of chemical reagents for obtaining an indication solution. This method can be universal and used to study the permeability of chemically active aggressive substances through special materials. from which it is inevitable to develop modern special protective clothing.