Some phosphoric acid production techniques are introduced, such as nitric acid technique, hydrochloric acid technique, sulfuric acid technique, which use phosphate rock as raw material.
介绍了以磷矿为生产原料的硝酸法、盐酸法、硫酸法等湿法磷酸生产工艺，并对其工艺进行了说明和比较。
2
The corrosion behavior of sintered NdFeB in nitric acid, hydrochloric acid, vitriol, phosphate and oxalic acid was studied.