Description
Aluminum triphosphate(AlH2P3O10・2H2O) is a white powder slightly soluble in water characterized by a laminar structure composed of crystal platelets. The controlled release of the tripolyphosphate ion from aluminum triphosphate forms an excellent protective film over the surface of iron and/or zinc metal substrates. This film exhibits excellent corrosion inhibition. The aluminum triphosphate contains two molecules of water of crystallization, which will be released around 105℃ and become an anhydrous compound with a reversible hydration reaction.
A Silica and Magnesium compound is specially designed to change the pH of oxygen in water, which penetrates the coating film, to an alkalinity at which the zinc ion(Zn2+) is hard to dissolve. This compound sequesters the dissolution of the zinc ion on the metal surface at the initial onset of corrosion. At the anodic side, the silicate ion (SiO44-) bonds with the zinc ion(Zn2+) to form a zinc silicate film and at the cathodic side magnesium ion(Mg2+) bonds with the hydroxy ion(OH-) to give a magnesium hydroxide film. These passivation films, formed together on the metal surface impart excellent anticorrosive performance.
Applications
Electrodeposition coatings, Coil coatings, Automobile parts coatings, General Industrial coatings, Architectural coatings, Powder coatings, Heavy-duty coatings, Wash primer, etc.
Resin Systems
Solvent based, Water based, Power coatings
Substrates
Steel, Zinc galvanized steel, Aluminum, Magnesium alloy
