The effect of titanium nanoparticles on the corrosive activity of de-icing agents

Abstract

The article considers the processes of corrosion of the vehicle body influenced by road pollution components. It is noted that the support frameworks, especially their bottom, are most susceptible to corrosion damage. This is due to the presence in such bodies of seams, gaps, as well as hollow elements (spars, amplifiers, thresholds), which create favorable conditions for the occurrence and development of corrosion processes. A decisive role in this process is played by aggressive pollution of the road surface. The study of samples of the road surface of the highway has showed that they mainly include the following components: ammonium ions NH4+, sulphates SO42–, chlorides Cl–, nitrates NO3–. When assessing the corrosivity of the road surface pollution, comparative studies were carried out with sodium chloride solution, which showed that the road simulating environment (RSE) is equivalent in corrosivity to 5 % aqueous solution of sodium chloride. Experimental data on the dependence of steel corrosion in selected media on the duration of exposure and aeration of solutions are presented. Aeration of solutions increases corrosion losses of steel by 37.50% in sodium chloride solution and by 64.20 % in RSE. Kinetic equations for the dependence of the corrosion rate on time are derived. A hypothesis has been put forward that it is possible to effectively protect vehicle bodies from corrosion with the help of inhibitors with the addition of nanoparticles (NPs). In this regard, potassium monoborate (PMB) and PMB + titanium dioxide nanoparticles were studied as a corrosion inhibitor in RSE. It has been experimentally proven that PMB reduces the corrosivity of RSE, and titanium dioxide NPs enhance this effect. This composite can be recommended as an effective anti-corrosion additive.