Low Hardness Water Corrosion and Scale Inhibitor Function
In the water treatment industry, the functional and practical effects of bactericides and scale inhibitors are satisfactory. With the diversification of sewage treatment problems, the industrial development of scale inhibitors has gradually become more comprehensive.
The newly developed scale inhibitors have become the main products in water treatment chemicals due to their excellent performance and wide range of product applications. Now, IRO leads everyone to understand the performance of low-hardness corrosion and scale inhibitor products and the details of how it works.
Experts in the professional development and production of water treatment agents pointed out that common scale inhibitor products mainly consist of organic phosphine (ATMP) copolymers, copper corrosion inhibitors and the like. They are mainly used for anti-fouling of power plant circulating water systems. These scale inhibitors have a remarkable effect on water treatment such as high hardness, high alkalinity, and high corrosion resistance.
High-quality scale inhibitors are effective in preventing fouling of corrosion products in cooling water systems. And avoid deposits, maximizing protection against steel and other metal fittings to prevent acid corrosion.
High-quality industrial scale inhibitor products often have both corrosion inhibition and scale inhibition. Good corrosion and scale inhibitors should also have good dispersion properties, lattice distortion and slow corrosion properties.
Low hardness water corrosion and scale inhibitor is a mixed corrosion inhibitor. It mainly inhibits corrosion inhibition by metal polarization. This corrosion and scale inhibitor consists of a special surfactant and a highly effective dispersant. It can be used as a cooling medium for low hardness water systems. Low hardness water has low calcium and magnesium ion content and no tendency to foul.
The low-hardness water corrosion and scale inhibitor does not contain toxic substances such as nitrite and chromate, and it is environmentally friendly. And its corrosion rate to carbon steel is much lower than the national standard and can be used normally.
As a cooling medium for water in low-hardness water softening systems, low-hardness water corrosion and scale inhibitors can reduce calcium and magnesium ions. No scaling, no corrosion. The corrosion inhibitor sequesters a divalent cation in water, and a protective film is formed on the surface of the metal formed by Ca2+ and Mg2+ in order to exert a scale inhibiting effect.
Because there are few Ca2+ and Mg2+ in soft water, this makes water corrosion more difficult than other water quality. On the basis of a large number of experiments, after screening, we chose a green environmentally friendly softening water special corrosion inhibitor. It is a hybrid corrosion inhibitor that inhibits corrosion inhibition primarily through metal polarization.
In addition, the principle of low-hardness water corrosion and scale inhibitor effect specifically includes the following two aspects.
- Electrostatic repulsive forces increase the dissolution of the copolymer by adsorbing inorganic salt crystallites and hindering coalescence between the particles. This repulsive force keeps them in a good dispersion to prevent or reduce the formation of scale.
- The copolymer dissolved in water is solubilized by complexation. The molecular chain produced by ionization is negatively charged, and it forms a water-soluble complex or a chelate compound with Ca2+, which increases the solubility of the inorganic salt and acts as a scale inhibitor. At the same time, it is possible to form a dense protective film on the metal surface, which effectively suppresses corrosion of the metal.
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