FIRE PROTECTION OF METAL STRUCTURES WITH INFLATING COATINGS (OVERVIEW)

Andrii Berezovskyi; Artem Bychenko; Bohdan Kopyl

Andrii Berezovskyi Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine
Artem Bychenko Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine
Bohdan Kopyl Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine

Keywords: intumescent fire-resistant coatings, metal structures, polymers, water-based coatings, metal fire protection

Abstract

In the article, the analysis of fire-resistant intumescent coatings, which are currently used in Ukraine and abroad, as well as prospects for the development of new intumescent coatings with improved properties, is carried out.

The quality of intumescent coatings is usually determined by the following main characteristics:

• flame retardant efficiency of the material,

• technological application and recovery,

• resistance to the effects of the external environment and the warranty service life of the coating (integrity of coatings: cracking, delamination and adhesive strength to the metal surface),

• operating conditions of the coating.

After analyzing the works of scientists and the characteristics of fire-resistant coatings, it is possible to conclude that the majority of reactive coatings (those that swell) of metal structures that exist today correspond to groups T3 (highly dangerous) and T4 (extremely dangerous) due to the toxicity of combustion products.

The process of swelling of such coatings during a fire begins already in the first minutes of their exposure to fire. Accordingly, the release of dangerous toxic products of thermal oxidation destruction from these swollen coatings poses an extreme danger to humans. Therefore, the scientific task of developing new reactive flame retardant coatings for metal building structures with improved properties is urgent.

The use of intumescent fireproof coatings is one of the most effective methods of fireproofing metal structures. This method is used when it is necessary to simply, quickly and economically increase the fire resistance limit of the structure up to 90 minutes. The combination of new, more advanced components in the development of intumescent fire-resistant coatings will eliminate the shortcomings of existing compositions and improve their properties. Special attention is planned to be paid to the creation of new flame retardant compositions based on styrene-acrylic water dispersion with improved technological properties.