TiO2- Polyurethane Cocopol Blend Nanocomposites as an Anticorrosion Coating for Mild Steel

A. Ruda, Marjune Tamayo Bonilla, Kurt Sterling M. Ubas, Amierson C. Tilendo, D. J. E. Estrada, R. Capangpangan, R. M. T. Cumba, J. Labis, N. L. Sayson, Arnold A. Alguno
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Abstract

Mild steels were the most frequently used materials in industries and factories since it possesses unique properties but due to weak environmental changes, these cause deterioration and corrosion to the materials’ surface. To prevent such, protective coatings were applied to protect against corrosion in which by incorporating titanium nanoparticles in polyurethane coatings. Titanium nanoparticles were synthesized using titanium butoxide as a precursor. The obtained nanoparticles were used as an inhibitor mixed with coconut oil-based polyurethane polyol blend against the corrosion on mild steel of 3.5% of sodium chloride solution which has been investigated using the Tafel polarization technique. The polarization curves of the corrosion potential for bare mild steel, along with different amounts of titanium nanoparticles coating, exhibit a positive shift. This shift indicates that the coating film effectively reduces the transport path for the corrosive solution, providing a protective barrier against corrosion. This observation is further supported by the results of the adhesive strength test, which demonstrates that the attachment of the coating films to the metal increases with higher amounts of titanium nanoparticles. This indicates improved adhesion and a stronger bond between the coating and the substrate, enhancing the overall corrosion resistance. The increase of contact angle test confirms the improvement of the coating’s hydrophobicity with the addition of titanium nanoparticles. This suggests that the coating repels water more effectively, further contributing to its protective properties against corrosion. Results also show that the addition of 4wt% of titanium nanoparticles has better anti-corrosion properties than the PU CCP alone, and 0.5, 1.0, and 2.0wt% of titanium added.
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作为低碳钢防腐涂层的二氧化钛-聚氨酯椰油共聚物纳米复合材料
低碳钢是工业和工厂中最常用的材料,因为它具有独特的性能,但由于环境的微弱变化,会导致材料表面老化和腐蚀。为了防止这种情况的发生,人们在聚氨酯涂层中加入了纳米钛粒子,从而涂上了保护涂层以防止腐蚀。纳米钛粒子是以丁氧化钛为前体合成的。获得的纳米粒子与椰子油基聚氨酯多元醇混合物混合用作抑制剂,可防止 3.5% 氯化钠溶液对低碳钢的腐蚀。裸低碳钢的腐蚀电位极化曲线和不同钛纳米颗粒涂层的腐蚀电位极化曲线均呈现正移。这种偏移表明,涂膜有效地减少了腐蚀性溶液的传输路径,提供了防止腐蚀的保护屏障。粘附强度测试结果进一步证实了这一观点,该测试结果表明,纳米钛粒子含量越高,涂膜与金属的附着力越强。这表明涂层与基底之间的附着力得到改善,粘合力更强,从而提高了整体耐腐蚀性。接触角测试的增加证实了纳米钛粒子的加入改善了涂层的疏水性。这表明涂层能更有效地拒水,从而进一步增强其防腐蚀保护性能。结果还显示,添加 4wt% 的纳米钛粒子比单独的聚氨酯 CCP 以及添加 0.5、1.0 和 2.0wt% 的钛粒子具有更好的防腐蚀性能。
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