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Outlook on Organic Phosphonate Corrosion and Scale Inhibitors

  Since the development of organic phosphine water treatment agent HEDP in foreign countries in the 1960s, organic phosphine salt water treatment agents have undergone generations of development. The first generation organic phosphonic acid salt water treatment agents HEDP and ATMP, as corrosion and scale inhibitors, dominated phosphorus based formulations for nearly 20 years until the late 1970s, when PBTC emerged to meet the needs of high concentration ratios. Subsequently, with the emergence of HPA in the mid-1980s, it formed the expected all organic water treatment agent that could compete with metal ion formulations. In the 1990s, there was further development of organic phosphonic acid salt water treatment agents, with products represented by polyamino polyether methylphosphonic acid (PAPEMP) and POCA. Its main feature was the increase in molecular size, leading to the emergence of large molecule organic phosphonic acid salt water treatment agents. Since the early 1990s, the dema