This study aims to analyze the hot corrosion behavior of Cr3C2 coatings mixed with varying amounts of NiCr on T11 boiler steel under high-temperature conditions. It evaluates the corrosion resistance of different coatings using thermogravimetric analysis, X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques.
Cr3C2-NiCr coatings were deposited on T11 steel using the high velocity oxygen fuel method. Samples were exposed to a molten salt environment at 800°C for 50 cycles, and their degradation was analyzed using thermogravimetric analysis, XRD and SEM/energy-dispersive X-ray spectroscopy (EDS). The study was conducted at a single temperature (800°C), requiring further research on long-term exposure and different thermal conditions for broader industrial applications. The findings support the development of corrosion-resistant coatings for boiler steels, potentially reducing maintenance costs, increasing operational efficiency and extending the lifespan of components in high-temperature industrial environments. Enhancing the corrosion protection in power plants supports sustainable development goal (SDG) 7 (affordable and clean energy) by improving energy efficiency, SDG 9 (industry, innovation and infrastructure) by promoting sustainable industrial practices and SDG 12 (responsible consumption and production) by reducing material wastage and environmental impact.
All coatings improved corrosion resistance, with 100% Cr3C2 showing the best performance. However, 65Cr3C2-35NiCr exhibited superior corrosion resistance due to oxide and carbide formation, enhancing longevity compared to uncoated T11 steel.
The study was conducted at a single temperature (800°C), requiring further research on long-term exposure and different thermal conditions for broader industrial applications.
The findings support the development of corrosion-resistant coatings for boiler steels, potentially reducing maintenance costs, increasing operational efficiency and extending the lifespan of components in high-temperature industrial environments.
Enhancing the corrosion protection in power plants supporting SDG 7 (affordable and clean energy) by improving energy efficiency, SDG 9 (industry, innovation and infrastructure) by promoting sustainable industrial practices and SDG 12 (responsible consumption and production) by reducing material wastage and environmental impact.
This research provides valuable insights into the corrosion resistance of Cr3C2-NiCr coatings under high-temperature conditions. It highlights the potential of 65Cr3C2-35NiCr coatings for improved performance, offering an innovative approach to enhancing boiler steel durability in extreme environments.
