Functional Polymer Nanocomposites with Increased Anticorrosion Properties and Wear Resistance for Water Transport

Abstract

Corrosive destruction and hydroabrasive wear is a serious problem in the operation of machine parts and water transport mechanisms. It is promising to develop new composite materials with improved properties to increase the reliability of transport vehicles. In this regard, the use of new polymer-based materials, which are characterized by improved anticorrosion properties and wear resistance, is promising. In this work, therefore, for the formation of multifunctional protective coatings, epoxy dian oligomer brand ED-20, polyethylene polyamine (PEPA) hardener, a mixture of nanodispersed compounds with a dispersion of 30–90 nm, fillers Agocel S-2000 and Waltrop with a dispersion of 8–12 μm, and particles of iron slag with a dispersion of 60–63 μm are used for the formation of multifunctional protective coatings. Using the method of mathematically planning the experiment, the content of additives of different physico-chemical natures in the epoxy binder is optimized to obtain fireproof coatings with improved operational characteristics. A mathematical model is developed for optimizing the content of components in the formation of protective anticorrosion and wear-resistant coatings for means of transport as a result of the complex effect of a mixture of nanodispersed compounds, iron scale, and Waltrop. Based on the mathematical planning of the experiment, new regularities of increasing the corrosion resistance and resources of the means of transport are established through the formation of four different protective coatings, which are tested for resistance to aggressive environments (technical water—CAS No. 7732-18-5, gasoline—CAS No. 64742-82-1, acetone—CAS No. 67-64-1, I-20A lubricant—CAS No. 64742-62-7, sodium solutions—CAS No. 1310-73-2, and sulfuric acid—CAS No. 7664-93-9) and hydroabrasive wear resistances. A study of the change in the permeability index in aggressive environments is additionally carried out, taking into account the rational ratio of dispersive fillers in the epoxy binder, which made it possible to create an effective barrier to the penetration of aggressive water molecules into the base. A decrease in the permeability of protective coatings by 2.0–3.3 times relative to the epoxy matrix is achieved. In addition, the wear resistance of the developed materials under the action of hydroabrasion is investigated. The relative resistance of the CM to the action of hydroabrasion was found by the method of materials and coatings testing on the gas-abrasive wear with a centrifugal accelerator. This method enables one to model the real process of the wear of mechanism parts under the hydroabrasive action. It is shown that the coefficient of the wear resistance of the developed materials is 1.3 times higher than that of the polymer matrix, which indicates the resistance of the composites to the influence of hydroabrasive environment. As a result, modified epoxy composite protective coatings with improved anticorrosion properties and wear resistance under hydroabrasive conditions are developed. It is established that the protective coating filled with particles of a mixture of nanodispersed compounds (30–90 nm), iron scale (60–63 μm), and Waltrop (8–12 μm) has the lowest permeability indicators. The permeability in natural conditions of such a coating during the time t = 300 days of the study is χ = 0.5%, which is 3.6 times less than the similar indicators of the epoxy matrix. It is substantiated that the protective coating filled with particles of a mixture of nanodispersed compounds (30–90 nm), iron scale (60–63 μm), and Agocel S-2000 (8–12 μm) is characterized by the highest indicators of wear resistance. The coefficient of wear resistance under the action of hydroabrasion of such a coating is K = 1.75, which is 1.3 times higher than the similar indicators of the original epoxy matrix.

An Overview of Micro- and Nano-Dispersion Additives for Asphalt and Bitumen for Road Construction

“…These influences are dependent on the used particle, used matrix, particle treatment, amount of used nanoadditives, and other factors. Overall, the research shows that the properly selected additives could significantly improve the thermal, mechanical, rheological, and barrier properties and conductivity [58][59][60][61], including anti-corrosion properties and wear resistance [31,[62][63][64][65][66][67]. Moreover, they could significantly change the magnetoelectric properties [68,69].…”

“…Nowadays, nanocomposites find applications in many areas and industries. One of the most important is various protective coatings with nano-dispersed particles [65]. This coating has usually significantly increased operational characteristics, including corrosion resis-tance [65,67].…”

“…One of the most important is various protective coatings with nano-dispersed particles [65]. This coating has usually significantly increased operational characteristics, including corrosion resis-tance [65,67]. They can be applied to different materials, including steel and concrete [66,67].…”

The durability increasing of high-wear cast parts of mining and processing equipment

“…When processing ore in the mining industry, ball grinding mills (BGMs) are widely used, which perform the main function in the technological process of grinding ores. Cast parts of mills work in severe conditions of hydro-abrasive wear combined with shock loads [9]. As a rule, the service life of the BGMs depends on the durability of only a few critical parts that are subject to wear during operation, and therefore, to ensure reliable and economical operation of the equipment, the main attention should be paid to increasing the durability of these parts [10].…”

Increasing the Service Life of Marine Transport Using Heat-Resistant Polymer Nanocomposites

“…Carbon nanofillers, such as nanotubes, fullerenes, nanocarbon black, and graphene, are used to improve strength characteristics and prevent thermal destruction or to increase the temperature at which the combustion process occurs [16,18,[23][24][25][26]. The authors of [27][28][29][30][31][32][33] investigated the course of the process of thermal destruction of polymers. These provisions are consistent with the results of the research given in the work by authors [18][19][20][21][22][23][24][25][26][27].…”