Coating classification: environmental protection antirust pigment (I)

Core tip: Product Introduction: antirust substances, such as red lead powder, iron red powder, composite iron titanium powder, aluminum zinc tripolyphosphate powder, etc., are collectively referred to as antirust pigments The antirust pigments used in traditional coatings are mostly pigments containing chromium, lead, cadmium, etc., such as red lead, lead powder, and chromate of zinc, barium, lead, etc Although the coatings prepared have good anti-corrosion performance, they are toxic in themselves, and will pollute the environment and harm health in the process of production and use Many countries have strictly restricted their use Nowadays, environmental protection has been paid more and more attention to, developing new environmental protection and pollution-free antirust coating Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Coating home news: Product Introduction: antirust substances, such as red lead powder, iron red powder, composite iron titanium powder, aluminum zinc tripolyphosphate powder, etc., are collectively referred to as antirust pigments The antirust pigments used in traditional coatings are mostly pigments containing chromium, lead, cadmium, etc., such as red lead, lead powder, and chromate of zinc, barium, lead, etc Although the coatings prepared have good anti-corrosion performance, they are toxic in themselves, and will pollute the environment and harm health in the process of production and use Many countries have strictly restricted their use Nowadays, more and more attention has been paid to environmental protection, and the development of new environmentally friendly and pollution-free Antirust Coatings has become one of the development trends At present, researchers at home and abroad have developed a variety of non-toxic and efficient antirust pigments, such as phosphate, molybdate, borate and flake pigments Development background: metals and their alloys are widely used in various fields of national economy According to statistics, the global metal loss caused by corrosion is up to 20% ~ 40% of the annual metal output, which is about 6 times of the total natural disasters such as earthquake, flood and typhoon, resulting in huge economic losses At the same time, the corrosion damage of metal equipment and facilities will affect the stability of production and disturb people's life order, and even lead to safety accidents, resulting in personal injury Therefore, metal corrosion prevention is very important Organic coating anti-corrosion has become the most effective, economical, practical and widely used method so far It has many advantages such as excellent performance, convenient manufacture, low price and so on Nowadays, more and more attention has been paid to environmental protection, and the development of new environmentally friendly and pollution-free Antirust Coatings has become one of the development trends Classification: according to its action mechanism, it can be divided into: ① physical antirust pigment physical antirust pigment itself has stable chemical properties, its antirust mechanism does not depend on the chemical activity of the pigment itself, but on the physical properties they have The commonly used non-toxic physical antirust pigments include iron oxide red, mica iron oxide, mica powder, glass scale, stainless steel scale, aluminum powder and aluminum slurry ② Chemical antirust pigment chemical antirust pigment is based on its own chemical activity In the process of metal corrosion, it reacts with metal ions on the metal surface to form a dense passivation film phosphating film to inhibit its corrosion process, or according to the electrochemical principle, it protects metal by sacrificing anode The antirust pigment can also react with some components in the paint to produce compounds with stable performance and good water resistance and low permeability In the process of coating, some pigments form corrosion resistant complex, which improves the antirust effect Common non-toxic chemical antirust pigments are: phosphate, molybdate, borate, ion-exchange pigments, etc ③ The comprehensive antirust pigment with both physical and chemical antirust mechanisms has both physical and chemical antirust mechanisms, with more excellent anti-corrosion performance The commonly used non-toxic antirust pigments are: flake zinc powder, flake zinc aluminum alloy, composite iron titanium powder, etc Testing process: it is impossible to directly determine the antirust ability of antirust pigment It can only be used in the coating, and then according to the national standards "GB / t1736-79, GB / t10125" to measure the length of salt water resistance and salt fog resistance time to measure the anti rust ability of the anti rust pigment in the coating As the salt spray resistance changes not only with the type and amount of antirust pigment, but also with the type of base material, therefore, the determination of the antirust ability of iron titanium powder can only be made into a certain kind of antirust paint, and its salt spray resistance can be measured to measure its antirust ability For example, salt water resistance of iron titanium alkyd antirust paint can reach 58 days; salt water resistance of iron titanium epoxy antirust paint can reach 80 days The corresponding red lead alkyd antirust paint can resist salt water for up to 10 days, while red lead epoxy antirust paint for up to 20 days Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,