Paint knowledge | antirust paint Antirust mechanism

Core tip: the main component of antirust paint is film-forming material of antirust pigment box It is usually named after antirust pigment, such as red lead antirust paint, iron red antirust paint, etc If it can be divided into four categories: physical antirust paint, chemical antirust paint, electrochemical antirust paint and comprehensive antirust paint 1 Physical antirust paint this kind of antirust paint does not have chemical or electrochemical reaction with the painted metal surface basically, and its antirust effect has two aspects: 1) it adopts chemical stable inert pigments and fillers which are insoluble in water and not easy to be decomposed and damaged by corrosive medium, and the coating itself is relatively stable; Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Home of coatings: the main component of antirust paint is antirust pigment box film-forming material It is usually named after antirust pigment, such as red lead antirust paint, iron red antirust paint, etc If it can be divided into four categories: physical antirust paint, chemical antirust paint, electrochemical antirust paint and comprehensive antirust paint 1 Physical antirust paint this kind of antirust paint does not have chemical or electrochemical reaction with the painted metal surface basically, and its antirust effect has two aspects: 1) it adopts chemical stable inert pigments and fillers which are insoluble in water and not easy to be decomposed and damaged by corrosive medium, and the coating itself is relatively stable; The particles of these pigment fillers have good filling effect and less surface defects, making the structure of the coating very dense Not only the strength is increased, but also some pigment fillers can reduce the penetration speed of water, oxygen and ions to the paint film when they are used properly 2) Some antirust paints are mainly made of fine scaly materials Physical antirust pigments mainly include: iron red, natural iron red, mica iron oxide, aluminum powder, graphite powder and fine glass flakes 2 Chemical antirust paint chemical antirust paint is the main type of antirust paint They use a variety of chemical active pigments, and change the surface properties and the characteristics of the reaction products by chemical reaction to achieve the purpose of rust prevention The main varieties of chemical antirust pigments are: lead pigments, chromate pigments, phosphate pigments, organic phosphate pigments, etc 3 According to the electrochemical corrosion theory, the anode with negative electrode position is corroded in the corrosion cell If the coating on the metal has a lower electrode potential than the metal, when there is chemical corrosion, the coating is anode and the metal is cathode without corrosion, which is the design basis of cathodic protection coating At present, the most widely used primer is zinc rich primer 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,