General knowledge of coating: how much do you know about acid and alkali resistant anticorrosive coating

Core tip: acid and alkali resistant anticorrosive paint can be divided into continuous acid resistance or alkali resistance, alternating acid and alkali resistance or acid and alkali resistance at the same time The pH value can be from 1-12 The aging resistance of the coating is low and the adhesion is good The anti-corrosion principle of the basic anti-corrosion paint mainly includes three aspects: electrochemical principle, chemical principle and physical principle 1 Electrochemical action of anticorrosion The electrochemical function of anticorrosion refers to the addition of some special substances in the antirust paint, so that when water and oxygen pass through the antirust paint, they will react to form anti-corrosion ions, passivate the surface of steel and other metals, thus preventing the metal from leaving 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 Coating home news: acid and alkali resistant anti-corrosion paint is divided into continuous acid or alkali resistance, alternating acid and alkali resistance or acid and alkali resistance at the same time The pH value can be from 1-12 The aging resistance of the coating is low and the adhesion is good The anti-corrosion principle of basic anti-corrosion paint mainly includes three aspects: electrochemical principle, chemical principle and physical principle: 1 The electrochemical function of anticorrosion refers to the addition of some special substances in the antirust paint, so that when water and oxygen pass through the antirust paint, they will react to form anti-corrosion ions, passivate the surface of steel and other metals, so as to prevent the dissolution of metal ions and achieve the purpose of anti-corrosion The most common of these special substances is chromate 2 Chemical principle of anti-corrosion: the chemical principle of anti-corrosion is to neutralize harmful acid and alkali substances into neutral harmless substances to protect the materials in the anti-corrosion coating from corrosive substances Some amphoteric compounds, such as aluminum hydroxide, barium hydroxide and zinc oxide, are often added to the antirust paint These substances can easily react with acid-base harmful substances to achieve the anti-corrosion effect 3 Physical principle of anti-corrosion: the physical principle of anti-corrosion is to separate the protected materials from the corrosive substances outside with anti-corrosion coating The physical principle of antirust paint is to use film-forming agent to obtain dense anti-corrosion coating to isolate the damage of anti-corrosion effect on the protected materials For example, lead soap can be formed after the reaction of paint containing lead and oil, so as to ensure the compactness of anti-corrosion coating In addition, the acid and alkali resistant anticorrosive paint should have good adhesion to the substrate and good physical and mechanical properties of the coating, such as low shrinkage, appropriate hardness, toughness, wear resistance, temperature resistance, etc Acid and alkali resistant anti-corrosion paint can be used under severe conditions, and has good durability and weather resistance It can be used for 5 or more years under severe conditions such as ocean and underground, even in acid, alkali, salt and solvent media, and under certain temperature conditions, it can also be used for more than 3 years 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,