Fire-resistant and antistatic paint coatings for machinery and equipment of agro-industrial complex

Abstract

The operation of machinery and equipment in the agro-industrial complex is characterized by specific features, and one of which is increased fire hazard in which the mobile equipment operates in the agro-industrial complex. Fire hazard of agro-industrial complex objects can be significantly reduced by using their reliable grounding as well as special fire-protective and antistatic paint coatings. This paper discusses the use of powders of nanosized materials: Al(OH)₃ and Mg(OH)₂ with particle size 30...50 nm as additives which being introduced into paint and varnish materials make it possible to change their physical and chemical properties: fire resistance (ability to ignition and flame propagation) and antistatic characteristics (relative dielectric permittivity and tangent of dielectric loss angle). It has been found that by applying the above additives in two-component acrylic auto enamel AK-1301 (in Russian) it is possible to increase corrosion resistance, fire resistance, and antistatic characteristics. The studies conducted at the Novosibirsk State Agricultural University show that the use of additives Mg(OH)₂ is preferable to Al(OH)₃ because when introducing it into the studied coatings in the concentration of 10...15 wt.%, the increase in fire resistance (increase in ignition temperature from 128°C to 168°C, and the time of resistance to ignition from 15 to 28 sec.) occurs with the preservation of the initial value of adhesion coating - 1 point. As an additive that increases the antistatic properties of paint coatings based on acrylic enamel AK-1301, carbon nanotubes may be proposed; with their introduction in the studied coatings in the concentration of 0.05...0.25 wt.% there is an increase of the merit index (up to 127 points) and a decrease in the tangent of the angle of dielectric loss (up to 0.008). The conducted research shows that the combination of fire resistance and resistance to static electricity of nanomodified paint and varnish coatings may become one of the new methods of increasing safety, operational qualities of machines and equipment in agro-industrial complex.