高硅耐蚀铸铁是一种应用较广的优质耐蚀金属材料,它在一系列氧化性介质(如各种温度、浓度的硝酸、硫酸、铬酸),室温的盐酸,各种浓度、温度的有机酸和一系列盐溶液介质中都有很好的耐蚀性能。虽然这种铸铁机械性能低,质地硬脆,难以加工,抗热冲击性差,但由于成本低、制造方便、耐蚀性优良,仍被广泛地应用着高硅耐蚀铸铁可以用来制造需要耐腐蚀的泵、阀、罐、塔、锅、管等另件。目前国内应用较多的是下列两种高硅铸铁(表1): 高硅铸铁的线收缩率为1.2～2.6％。由于 High silicon corrosion of cast iron is a widely used high-quality corrosion-resistant metal materials, it is in a series of oxidizing media (such as various temperature and concentration of nitric acid, sulfuric acid, chromic acid), hydrochloric acid at room temperature, various concentrations, temperature Organic acids and a series of salt solution medium have good corrosion resistance. Although this cast iron has low mechanical properties, hard brittle texture, difficult processing and poor thermal shock resistance, it is still widely used because of its low cost, easy manufacture and excellent corrosion resistance. Corrosion of the pump, valve, tank, tower, pot, pipe and other pieces. Currently used more of the following two kinds of high-silicon cast iron (Table 1): high silicon cast iron line shrinkage of 1.2 ~ 2.6%. due to