Investigating the use of TiO2 and TiO2 microparticles waterproofed with nanotechnology in epoxy paint composite coatings on X52 steel

Subject Areas : Journal of New Applied and Computational Findings in Mechanical Systems

Amir Kazemi ¹ , Ahmad Menshi ² , Mehdi Boroujerdnia ³

1 - Department of Materials Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
2 - Department of Materials Engineering, Isfahan University of Technology, Isfahan , Iran.
3 - گروه مهندسی مواد و متالورژی، دانشگاه آزاد اسلامی، واحد اهواز، اهواز، ایران

Received: 2022-10-11 Accepted : 2023-01-22 Published : 2023-02-20

Keywords: waterproof TiO2, Composite coating, epoxy paint, Corrosion Resistance, wear resistance,

Abstract :

In this research, two types of composite coatings based on epoxy paint reinforced by TiO2 nano and micro particles and TiO2 particles hydrophobicized by polysiloxane were prepared separately with concentrations of 1, 2, 3, 4 and 5% by weight to improve the properties of epoxy paint. and in order to investigate their behavior, they were applied on API 5L X52 steel and then their properties were investigated by conducting corrosion and wear tests. The thickness of the coatings was checked by a digital thickness gauge. The corrosion resistance behavior of the coatings was evaluated using the polarization method in 3.5% NaCl solution. The results of the corrosion test showed that by adding and increasing the concentration of reinforcing particles in the coatings, the corrosion resistance was improved, and also the composite coating of epoxy paint with 5% by weight of the hydrophobic TiO2 reinforcement showed better corrosion resistance than other samples. A scanning electron microscope (SEM) equipped with EDX was used to examine the morphological properties of the surface. In order to check the dispersion of micro particles in the field of coating, Map analysis was taken from the samples. The results obtained from Map analysis have shown the appropriate and uniform distribution of hydrophobic particles in the field of epoxy coating. The wear resistance of the coatings was performed by the bullet test machine on the disc. The results of the abrasion test showed that by adding and increasing the concentration of reinforcing particles in the coating, the abrasion resistance of the coating increased, but by comparing the epoxy composite samples, it was found that the hydrophobicity of the reinforcing particles had no effect on the abrasion resistance.

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