大型钢结构是大量基础设施的重要组成部分。桥梁、电站、输油输水管道、油气储罐、大型生产装置、船舶、海工结构、塔架及许多大型建筑物均大量采用钢结构。虽然所用的碳钢与一些低合金钢具有很好的力学性能与合理的价格,但它们存在着严重的电化学腐蚀问题。由于具有用量大、寿命要求 Large steel structures are an important part of a large infrastructure. Bridges, power stations, oil and gas pipelines, oil and gas storage tanks, large-scale production installations, ships, marine structures, towers and many large structures are heavily constructed of steel. Although carbon steel and some low-alloy steels have good mechanical properties and reasonable prices, they have serious electrochemical corrosion problems. As with a large amount of life requirements