In the heart of China, a groundbreaking study has shed new light on the corrosion behavior of two commonly used steels in the energy sector, Q235 and Q345. The research, led by YU Jianfei and his team from the State Grid Hubei Electric Power Co., Ltd., and the China Academy of Machinery Wuhan Research Institute of Materials Protection Co., Ltd., has significant implications for the longevity and maintenance of transmission tower equipment.
The study, conducted over 24 months in Wuhan’s atmospheric environment, revealed that Q235 steel experienced approximately 1.5 times more corrosion weight loss than Q345. This finding is crucial for the energy sector, where the durability of transmission towers is paramount. “The corrosion resistance of Q345 is notably better than that of Q235,” stated YU Jianfei, emphasizing the practical implications of the research. “This could influence material selection for future transmission tower projects, potentially leading to reduced maintenance costs and enhanced structural integrity.”
The research, published in ‘Cailiao Baohu’ (translated to ‘Materials Protection’), delved into the microscopic and macroscopic morphology of the corrosion products, identifying γ-FeOOH, α-FeOOH, and Fe3O4 as the primary compounds. Electrochemical testing further confirmed that both steels were controlled by anodic dissolution reactions during corrosion, with Q345 exhibiting superior resistance.
One of the most intriguing findings was the stabilization of rust layers over time. As the exposure period extended, the rust layers on both Q235 and Q345 steels became more stable, with a notable increase in self-corrosion potential and a decrease in corrosion current density. This discovery could revolutionize how we approach the maintenance of steel structures in atmospheric environments, suggesting that initial corrosion might actually protect the underlying metal over time.
The implications for the energy sector are vast. Transmission towers, which are the backbone of power distribution networks, often face harsh environmental conditions. Understanding the corrosion behavior of Q235 and Q345 steels can help engineers design more resilient structures, reduce downtime, and minimize the risk of catastrophic failures. This research could also influence the development of new corrosion-resistant materials, pushing the boundaries of what is possible in structural engineering.
As the energy sector continues to evolve, driven by the need for more efficient and reliable power distribution, studies like this one will play a pivotal role. By providing a deeper understanding of material behavior in real-world conditions, researchers are paving the way for innovations that could transform the industry. The work of YU Jianfei and his team is a testament to the power of scientific inquiry in shaping the future of infrastructure and energy distribution.
