Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Archives of Civil and Mechanical Engineering

1 2024

Powiadomienia systemowe

Sesja wygasła!
Sesja wygasła!
Sesja wygasła!

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: cementitious coating

Sortuj według:

Ogranicz wyniki do:

Effects of incorporation of nanotitania in magnesium phosphate cement for the protection of carbon steel in harsh environments

Sujitha V. S., Ramesh B., Xavier Joseph Raj

Archives of Civil and Mechanical Engineering

2024

Vol. 24, no. 2

art. no. e79, 2024

Corrosion is a major challenge to ensuring the durability and structural integrity of steel structures, particularly under harsh environmental conditions. In this work, we explored the possibility of incorporating nanotitania (TiO2) into magnesium phosphate cement (MPC) coatings to improve the corrosion resistance of low-carbon steel (LCS). Magnesium phosphate cement (MPC) has great potential to replace conventional organic coatings because of its corrosion resistance and sustainability. Titanium dioxide (TiO2) nanoparticles are included in the MPC coating to protect steel structures from corrosion because of their effectiveness in preventing them from decreasing the lifespan of steel. The material characterization of the MPC/TiO2 coatings was conducted using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) methods. Tafel polarization and electrochemical impedance spectroscopy (EIS) were used to assess the corrosion resistance of the coated and uncoated samples in a 3.5% NaCl solution. EIS measurements revealed that the MPC/TiO2 coatings, particularly those containing 10% TiO2, exhibited superior anti-corrosion properties. The resistance (Rcoat) measured for this coating was 1.22E10 Ω cm2, and the charge transfer resistance (Rct) reached 1.50E12 Ω cm2, demonstrating remarkable corrosion protection. The accelerated corrosion test proves that the inclusion of 10% nanotitania in the MPC controls the delamination of the coating. Additionally, the adhesion strength of 18.1 MPa for the MPC/10TiO2 coating confirms the durability of the coating. Only a small percentage of weight loss and adhesion loss were observed after 28 days of immersion in a corrosive NaCl environment, demonstrating the long-term durability of the MPC/TiO2 coatings. The findings of this study indicate that adding 10% TiO2 to MPC coatings has enormous potential for improving the corrosion resistance of LCSs. This cementitious coating material offers an effective way to reduce early oxidation in steel buildings, making it a useful tool in construction projects intended to ensure the prolonged lifespan of LCS components.