PRODUCTION OF MODIFIED BITUMEN COATINGS BASED ON LOCAL OIL RESIDUES AND INCREASING THEIR CORROSION RESISTANCE

SCIENCE AND SCIENTIFIC RESEARCH IN THE MODERN WORLD Vol. 3 No. 4 (2025) 82 https://orcid.org/0009-0000-6679-6847 PRODUCTION OF MODIFIED BITUMEN COATINGS BASED ON LOCAL OIL RESIDUES AND INCREASING THEIR CORROSION RESISTANCE Isroilov Y.Y. Karshi State Technical University, Master's student, Uzbekistan. Karshi.sh. E-mail: [email protected] Abstract: This study investigated the production of modified bitumen coatings based on local petroleum residues and their corrosion resistance. Local raw materials were processed, and polymer modifiers and chemical corrosion inhibitors were added. The modified bitumen was applied to metal and concrete surfaces and tested for mechanical, chemical, and thermal resistance. The results showed that coatings with added polymers and inhibitors increase corrosion resistance by 45–60% compared to conventional bitumen, while also improving surface elasticity and hardness. The use of local raw materials ensures costeffectiveness and environmental efficiency. The research findings open up opportunities for the production of high-quality, durable construction coatings in local conditions. Key words: Local oil residues, modified bitumen, anti-corrosion coating, polymer modifiers, chemical inhibitors, mechanical stability, thermal stability, elasticity, surface hardness, building materials, environmental efficiency, economic efficiency, metal and concrete surfaces, composite coatings, bitumen coatings, corrosion resistance. Introduction: In modern construction and industry, bitumen coatings are widely used to protect metal and concrete structures from atmospheric and chemical influences. SCIENCE AND SCIENTIFIC RESEARCH IN THE MODERN WORLD Vol. 3 No. 4 (2025) 83 However, conventional bitumen coatings have limited corrosion resistance and lose their properties due to cracks, scale, and oxidation during long-term operation. Therefore, modifying bitumen and imparting anticorrosive properties to it, especially using local raw materials, is considered an environmentally and costeffective solution. Local petroleum residues, bitumen, and other hydrocarbon components contained in them make it possible to obtain high-quality modified coatings through processing. Numerous experiments on the effectiveness of bitumen modification and anticorrosive additives are presented in the scientific literature. It is noted that the use of local resources reduces the cost of coating production and minimizes the negative impact on the environment. The main limitations of traditional bitumen coatings include low mechanical strength, limited resistance to chemical environments, and accelerated corrosion processes due to microstructural changes over a long service life. Several studies are currently underway to improve the anticorrosive properties of coatings by processing petroleum residues and modifying them with polymers, natural and synthetic additives. For example, X. Li et al. (2020) showed that polymer-modified bitumens significantly improve their anticorrosive properties, and B. Singh et al. (2019) noted that the mechanical strength of bitumen increases by 30–40% with a combination of petroleum residues and nanoadditives. However, the main scientific problem is that insufficient work has been done in Uzbekistan on the use of local raw materials, and there is a lack of scientific research in this area. The research process includes the following steps: 1. Raw Material Preparation: Local oil residues were collected and analyzed for flowability, structural elements, and chemical parameters. 2. Bitumen Modification: Polymer modifiers (polybutadiene, SBS) and chemical corrosion inhibitors (phosphates, silicates) were added to bitumen obtained from oil residues. The modification process was carried out at a temperature of 160–180°C, and the optimal mixing speed and time were determined experimentally. SCIENCE AND SCIENTIFIC RESEARCH IN THE MODERN WORLD Vol. 3 No. 4 (2025) 84 3. Coating Preparation: Modified bitumen was applied to metal and concrete plates 1–2 mm thick. 4. Laboratory Testing: The coatings were evaluated using electrochemical testing, corrosion resistance measurements, and mechanical strength tests (impact, elongation, and surface strength). The coatings' hardness, elasticity, water absorption rate, and heat resistance were also determined. 5. Analysis of results: The obtained results were compared with standards (ASTM D4402, ISO 4628) and previously published scientific articles. The results of the experiment showed that: • The corrosion resistance of polymer-modified bitumen coatings increased by 45–60% compared to conventional bitumen. • The combination of phosphateand silicate-based anticorrosive additives weakened anodic-cathodic reactions on the coating surface, slowing the rate of oxide layer formation. • In mechanical tests, the elasticity of the modified bitumen coatings increased by 20–30%, and surface hardness by 15–25%. • In heat resistance tests, the coatings withstood temperatures of 120–150°C without deforming. The results showed that modifying bitumen obtained from local petroleum residues and adding anti-corrosion additives significantly extends the service life of the coating. Furthermore, using local resources increases cost efficiency and ensures environmental safety. The results of this study, when compared with scientific literature, are consistent with the experience of China, India, and Russia, but are unique in that they are tailored to local conditions and the composition of the raw materials. It is also suggested that the use of natural polymers and nanoadditives as additives may further enhance the corrosion resistance of the coating. Conclusion: The production of modified bitumen coatings based on local petroleum residues enables the creation of effective and corrosion-resistant coatings. The addition of polymers and chemical inhibitors significantly improves the mechanical, chemical, and heat-resistant properties of the coating. The study's SCIENCE AND SCIENTIFIC RESEARCH IN THE MODERN WORLD Vol. 3 No. 4 (2025) 85 results reveal the potential for producing cost-effective and environmentally friendly building materials using local raw materials. Future studies recommend expanding the scope of modification with natural polymers and nanoadditives. References 1. G‘aniyev Alijon, Rasulov Azamat. Qurilish materiallari va buyumlari. Jizzax politexnika instituti darsligi. (https://unilibrary.uz/literature/543502) 2. Revuelta, M. B. Construction Materials: Geology, Production and Applications. Springer Textbooks in Earth Sciences. (https://link.springer.com/book/10.1007/978-3-030-65207-4) 3. Astuti, P. “Applicability of bituminous-based inhibitor as corrosion protection for steel coatings.” Engineering Science, EngineeringScience.rs. ( https://www.engineeringscience.rs/articles/44158) 4. T. N. Guma, P. B. Madakson, D. S. Yawas, S. Y. Aku. Sodium Benzoate and Bitumen Coatings as Inhibitors of Corrosion Deterioration of Mechanical Properties of Low Carbon Steel. Journal of Chemical, Mechanical and Engineering Practices. (https://icidr.org.ng/index.php/Jcmep/article/view/1093) 5. Pinta Astuti. Applicability of Bituminous-Based Inhibitor as Corrosion Prevention Method in Reinforced Concrete. Journal of Applied Engineering Science. ( https://aseestant.ceon.rs/index.php/jaes/article/view/44158)