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一、前言无机聚磷酸盐(三聚磷酸钠,六偏磷酸钠)作为水质稳定剂的缓蚀剂组份,较早被应用于工业循环冷却水系统,对碳钢有较好的缓蚀作用。但聚磷酸盐的主要缺点是容易水解生成正磷酸,在金属表面形成磷酸钙垢。因而在使用中常需加酸严格控制循环水的pH
I. INTRODUCTION Inorganic polyphosphates (sodium tripolyphosphate, sodium hexametaphosphate), as corrosion inhibitors for water quality stabilizers, have been used in industrial circulating cooling water systems earlier and have a better corrosion inhibition effect on carbon steel . However, the main disadvantage of polyphosphates is that they are easily hydrolyzed to orthophosphoric acid to form calcium phosphate scales on the metal surface. Therefore often need to add acid in the use of acid strictly control the pH of circulating water