HEDP: A versatile player in water treatment, from industrial to domestic use
HEDP (Hydroxyethylidene Diphosphonic Acid) is a highly efficient organic phosphonic acid scale and corrosion inhibitor with multiple excellent properties. It can form stable complexes with iron, copper, zinc and other metal ions, effectively dissolving the oxides on the metal surface, thus protecting the metal from corrosion. Even under the condition of up to 250℃, HEDP can still play an excellent corrosion and scale inhibition role, and its stability is still excellent in the high pH environment, not easy to hydrolyze, and not easy to decompose under general light and heat conditions.
Compared with other organic phosphonic acid (salt), HEDP's acid and alkali resistance, chlorine oxidation resistance is more prominent. It can form hexacyclic chelates with metal ions in water, especially calcium ions, and this unique structure gives HEDP a good scale inhibition effect and a significant solubility-limiting effect. When HEDP is used in combination with other water treatment agents, it can show ideal synergistic effect and further enhance the water treatment effect.
HEDP solid products of high purity, especially for winter cold areas, as well as the need for high purity additives occasions. In the electronics industry, HEDP can be used as an active ingredient in cleaning agents and as an additive in household chemicals.
In addition, HEDP is extremely widely used in the industrial fields of electric power, chemical industry, metallurgy, fertilizer and so on. It can be used in scale inhibition and corrosion inhibition treatment of industrial circulating cooling water system, medium and low pressure boiler, oil field water injection and oil pipeline. In the light textile industry, HEDP can be used as cleaning agent for metal and non-metal, as well as peroxide stabilizer and color-fixing agent in bleaching and dyeing industry. In the cyanide-free plating industry, HEDP plays an important role as a complexing agent, while in the pharmaceutical industry, it is used as a carrying agent for radioactive elements.