以三种不同含铬量的铸铁为试验材料，通过实验室静态全浸试验、工厂现场挂片试验、电化学试验，并辅以金相观察，探讨了合金元素Ｃｒ的加入对铸铁耐高温浓硫酸腐蚀性能的响影规律和作用机理，分析了溶液状态、介质浓度、温度等因素对铸铁耐蚀性的影响，为实际硫酸生产设备用材的进一步改进提供了理论依据。 Three kinds of cast iron with different chromium content were used as the experimental materials. Through the static immersion test in the laboratory, the coupon test in the factory and the electrochemical test, and the metallographic observation, the effects of alloying elements Cr on the high temperature resistant cast iron Sulfuric acid corrosion performance of shadow law and mechanism of action, analysis of the solution state, medium concentration, temperature and other factors on the corrosion resistance of cast iron, sulfuric acid production equipment for further improvement of the timber provides a theoretical basis.