Abstract
Structural elements in buildings exposed to high temperature may lose their original stability. Application of steel structures has several advantages; however, deflection under exposure to high temperatures may be a potential obstacle. Therefore, the aim of the study was to determine how temperature affects decomposition of protective paints applied in the construction. A dedicated installation for the analysis of the combustion process of protective coating paints in a laboratory scale was prepared. The experimental device consisted of the following parts: top-loading furnace connected to the gas conditioner, the LAT MG-2 gas mixer, and portable gas analyzer GASMET DX-4010. The following type of the protective powder coating paints were analyzed: alkyd and polyurethane. The obtained results indicated that during thermal decomposition of paints, formaldehyde, benzene, heptane, and butanol were released, however in different concentrations. Moreover, decomposition temperature affected the type and amount of released gas mixture components. With increasing temperature, increased release of formaldehyde and benzene was noticed, while the concentration of butanol and heptane decreased. Finally, the product of thermal decomposition emitted in the highest concentration was formaldehyde, which can cause irritation and sensitization in humans.
Highlights
Passive fire protection includes coatings and inherently flame-retardant materials [1]
In the field of structure engineering, intumescent paints are usually applied as protection material for steel structure that may be exposed to fire
We studied the decomposition of two pigments for the range of temperature between 80 ◦C and 110 ◦C, resulting in butanol, formaldehyde, benzene, and heptane fume release
Summary
Passive fire protection includes coatings and inherently flame-retardant materials [1]. In the field of structure engineering, intumescent paints are usually applied as protection material for steel structure that may be exposed to fire. A new approach for manufacturing superior thermal insulative/intumescent steel paint comprises exploiting phosphorous-containing copolymer as a fire-retardant additive [5,6]. Application of protective coating may minimize the risk of severe safety and environmental hazards, i.e., corrosion appearance [7]. Many techniques have been developed to minimize the corrosion effect [9]. Usage of iron oxides as protective pigments is common for anticorrosion paints [10]. Alkyd-based coatings are the most commonly used in solvent-based paints [11]. Incorporation of nanoferrite particles in soya alkyd coating may enhance their physico-mechanical properties [12]
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