anti-rust paint with non-toxic paint some progress

Metals and their alloys applications throughout all areas of the national economy . According to statistics, the global annual metal loss due to corrosion caused by the annual metal production capacity of up to 20% to 40 %, about earthquakes, floods, typhoons and other natural disasters, the sum of six times , resulting in huge economic losses. Meanwhile metal  aluminum stearate corrosion damage of equipment and facilities will also affect the stability of production and disrupt people's lives in order and even lead to accidents resulting in personal injury. Therefore, the metal corrosion is very important [ 1-3 ] . Organic coatings against corrosion has become by far the most effective, most economical and most common method [ 4 ] , with excellent performance, ease of manufacture , low price and a number of other methods can not match advantage. And more attention to environmental protection today, the development of new anti-rust paint environmental pollution became one of the trends [ 5,6 ] .
Anti-rust paint anti-rust paint varieties and dosage , as well as with anti-rust paint binder resin interactions occurring protective properties of the coating greatly affected [ 7 ] . The traditional use of the anti-rust paint coatings containing more chromium, lead , cadmium and other pigments such as red lead, lead oxide , and zinc , barium, lead chromate , with its mixture of the coating while having good anti -corrosion , but in itself toxic , and in the production and use of the process will pollute the environment and health hazards , many countries have strict restrictions on the use [ 8 ] . Therefore, the development of non-toxic anti-rust paint and coatings efficiently has become imperative. Researchers at home and abroad have developed a phosphates , molybdates , borates and flake pigments and other non-toxic and efficient anti-rust paint [ 9-12 ] . This article describes a variety of non-toxic anti- rust paint corrosion mechanism and application progress , according to their mechanism of action divided into: ① physical rust paint ; ② chemical rust paint ; ③ both physical and chemical mechanisms of the  PVC stabilizer for cable integrated anti- rust rust-preventive pigment . A physical anti-rust paint
 Physical rust pigment itself more stable chemical properties , its anti-rust pigment itself instead of relying on the mechanism of chemical activity , but they have to rely on physical properties. Conventional non-toxic physical rust red iron oxide pigments , mica iron oxide, mica , glass flake , stainless steel scales, such as aluminum and aluminum paste . 1.1 Iron oxide red
Short red iron oxide red , formula Fe2O3, its crystalline phase with α-Fe2O3 ( used as pigments ) and γ-Fe2O3 ( used as a magnetic material ) , and its crystal structure due to different methods of synthesis , there are cubic , spherical , needle like type , hexagonal , diamond -and hexagonal platelets . Red iron oxide is not soluble in water , alkali and acid , only in the case of heating to dissolve in concentrated acid , insoluble in an organic solvent and an organic base material , high heat resistance , α-Fe2O3 general heat resistance up to 1200 ℃. Iron oxide red pigments are inert , iron oxide pigments in the most stable , with good weather resistance , light, water, and the role of the atmosphere is stable , and can strongly absorb ultraviolet radiation, leaving the protected goods from red iron UV damage . For rust in the system is based on its dense coating of the items covered by the physical shielding effect for 13,14 ] , while iron red rust on the substrate have the ability , the ability of polluted gases, alkali, tinting strength good hiding power . Due to low prices , is used widely in rust , but the rust resistance 1.2 micaceous iron oxide
Micaceous iron oxide , the  heat stabilizer for foaming board main chemical ingredient of α-Fe2O3, is hexagonal single crystal flake , mica flake as having similar structures , so called micaceous iron oxide . Its chemical stability, non-toxic and tasteless , high temperature , UV, also has anti- chalking , rust resistance , alkali resistance , salt spray resistance , weather resistance and excellent performance [ 15 ] .
MIO MIO divided into natural and synthetic micaceous iron oxide two kinds . Natural micaceous iron oxide is made from natural minerals ( eg iron ore ) crushing, sorting , crushing derived , heat resistance up to 800 ℃ or more, contain more impurities, particle size distribution is uneven. Most of the world use natural micaceous iron oxide . The synthetic micaceous iron oxide due to high purity, particle size distribution, with a sense of three-dimensional sense of strong light , heat resistance is even higher than the natural micaceous iron oxide .