Application of Scale and Corrosion Inhibitor HEDP
[Use 1] is a scale inhibitor and corrosion inhibitor for boilers and heat exchangers, a complexing agent for cyanide-free plating, a chelating agent for soaps, a cleaning agent for metals and non-metals.
[Use 2] It is often used as a scale and corrosion inhibitor in boiler water, circulating water, and oilfield water injection treatment. Often formulated with polyhydroxy acid scale inhibitors and dispersants. It can also be used as a cyanide-free plating complexing agent, a fixing agent for bleaching and dyeing industry, and a hydrogen peroxide stabilizer.
[Use 3] This product is the main material for cyanide-free plating. It is formulated into a cyanide-free copper plating solution, and the copper plating layer directly on the steel has good bonding strength. The coating is smooth and the color is good. The general dosage is 60% and the content is 100-120 ml/L. The amount of copper sulfate is 15-20 g/L. In addition, before plating, the plated parts are immersed in the 1% to 2% solution of the product to turn the plated parts into an activated state, and then electroplating can further improve the effect.
[Use 4] This product is a new type of chlorine-free electroplating complexing agent, which is used as a main agent for water quality stabilization in the circulating cooling water system to prevent corrosion and scale inhibition. This product is one of the organic polyphosphonate-free water tablets. There are also some varieties of such products in China, such as aminotrimethylenephosphonic acid (ATMP): [CH2PO(OH)2]3N and B. Diamine tetramethylene phosphate (EDTMP) and the like. Organic polyphosphonic acid is a type of water treatment agent developed in the late 1960s and confirmed around the 1970s. The emergence of such treatments has made water slab technology a big step forward. Compared with organic polyphosphates, organic polyphosphonic acids have good chemical stability, are not easy to hydrolyze, can withstand higher temperatures and small amounts of chemicals, and have the characteristics of botheviating erosion performance. It is a kind of cathode type corrosion inhibitor and a kind of non-chemical equivalent scale inhibitor. When used in combination with other water treatment agents, it exhibits an ideal synergistic effect. It has excellent chelating energy for many metal ions such as calcium, magnesium, copper, zinc, etc., and even has good deactivation of inorganic salts such as CaSO4, CaCO3, MgSiO3, etc., so it is widely used in water treatment. technology. The product is low in toxicity, and the subcutaneous injection LD50 of the mice is 486.4 mg/kg.
[Usage 5] As a scale inhibitor, the concentration is generally 1~10mg/L, and the concentration is generally 10~50mg/L. The cleaning agent is generally used at a concentration of 1000~2000mg/L; usually with polycarboxylate type scale inhibition The dispersant is used in combination.
