河北程跃泵业有限公司

不断以来，腐蚀就是化工泵严重的危害之一，稍有不慎，轻则损坏设备，重则形成事故以至引发灾难。所以，化工泵假如是抽取一些有腐蚀性的介质就要特别留意。

      例如：硫酸是用处十分普遍的重要工业原料之一，不同浓度和不同温度的硫酸对资料的腐蚀区别十分大，关于浓度在80%以上、温度小于80℃的硫酸，碳钢和铸铁有较好的耐腐蚀性，但它不适用于高速活动的硫酸,不适用作化工泵的资料;普通不锈钢如304(0Cr18Ni9)、316(0Cr18Ni12Mo2Ti)对硫酸介质也是用处有限的。

      普通金属大多在化工泵运转时被疾速腐蚀毁坏，不锈钢是应用广的耐腐资料，对常温下一切浓度的硫酸都有良好的耐蚀性，值得一提的是含钼的不锈钢(如316、316L)对硫酸耐蚀性不只不优于普通不锈钢(如304、321)，有时以至不如。而关于高温硫酸，通常化工泵会采用钛及钛合金资料。

For a long time, corrosion is one of the serious hazards of chemical pumps. A little carelessness may damage the equipment, or even cause accidents or even disasters. Therefore, if the chemical pump is to extract some corrosive medium, we should pay special attention to it.

For example, sulfuric acid is one of the most widely used industrial raw materials. Sulfuric acid of different concentrations and temperatures has a great difference in the corrosion of data. As for concentrated sulfuric acid with concentration over 80% and temperature less than 80 ℃, carbon steel and cast iron have better corrosion resistance, but it is not suitable for sulfuric acid with high-speed activity, and it is not suitable for data of chemical pumps; Ordinary stainless steel such as 304 (0Cr18Ni9) and 316 (0Cr18Ni12Mo2Ti) is also of limited use for sulfuric acid medium.

Most common metals are destroyed by rapid corrosion during the operation of chemical pumps. Stainless steel is a widely used corrosion-resistant material, which has good corrosion resistance to all concentrations of sulfuric acid at room temperature. It is worth mentioning that the corrosion resistance of molybdenum containing stainless steel (such as 316, 316L) to sulfuric acid is not only not better than that of general stainless steel (such as 304, 321), sometimes even worse. For high temperature concentrated sulfuric acid, titanium and titanium alloy materials are usually used for chemical pumps.