Why can scale inhibitor inhibit scale? What is its principle?
  • Date:2022-02-25
  • Read:1983
A. Complexation compatibilization
The scale inhibitor can be separated from calcium and magnesium in water to form a stable soluble chelate, which can stabilize more calcium and magnesium ions in water, so as to increase the solubility of calcium and magnesium salts and inhibit the deposition of scale.
B. Electric double layer action mechanism, etc
It is enriched in the diffusion boundary layer near the growth nucleus to form an electric double layer and hinder the condensation of scale ions or molecular clusters on the metal surface.
C. Lattice distortion
After adding scale inhibitor, the reagent is adsorbed on the crystal and doped in the lattice lattice, which interferes with the crystallization of inorganic scale, distorts the crystal, or increases the stress inside the large crystal, so that the crystal is easy to crack and hinders the growth of scale.
D. Regeneration film removal inhibition
The reagent can form a film co precipitated with inorganic crystal particles on the metal heat transfer surface. When the film increases to a certain thickness, it breaks on the heat transfer surface and leaves the heat transfer surface with a certain size of scale layer. Due to the continuous formation and rupture of this film, the growth of scale layer is inhibited.
E. Coagulation and dispersion
When the anions formed by dissociation in water collide with calcium carbonate microcrystals, physicochemical adsorption will occur, so that the surface of microcrystals will form a double electric layer with negative charge. Because the chain structure of scale inhibitor can adsorb multiple microcrystals with the same charge, electrostatic repulsion can prevent microcrystals from colliding with each other, so as to avoid the formation of large crystals. When the adsorbed products touch other molecules, When the adsorbed crystals are transferred, the phenomenon of uniform dispersion of grains appears, which hinders the collision between grains and between grains and metal surface, reduces the number of crystal nuclei in the solution, and stabilizes calcium carbonate in the solution.
Scale inhibitor contains effective scale inhibition components. Based on the principle of reaction between dirt and acid root, it not only removes dirt, but also increases brightness and ensures the effect of scale inhibition. It is an environmentally friendly scale removal reagent, which is widely used in industry.