Paint knowledge | antirust mechanism of antirust paint
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Last Update: 2020-04-03
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Source: Internet
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Author: User
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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) using chemical stable inert pigments and fillers that are not soluble in water and are not easy to be decomposed and damaged by corrosive medium, and the layer ratio is relatively stable; Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and 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) using chemical stable inert pigments and fillers that are not soluble in water and are not easy to be decomposed and damaged by corrosive medium, and the layer ratio is relatively stable; The particles of these pigment fillers have a good filling effect with less surface defects, making the structure of the layer 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 layer coated on the metal has a lower electrode potential than the metal, when there is chemical corrosion, the layer is the anode, and the metal is the cathode without corrosion, which is the basis for the design of the cathodic protection layer 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,
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