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Plastic powder manufacturers share the types of anti-corrosion coatings

2019-01-17

Plastic powder manufacturers share the types of anti-corrosion coatings.


Anti-corrosion coatings are generally classified into conventional anti-corrosion coatings and heavy-duty anti-corrosion coatings, and are essential coatings in paint coatings. So what are the anti-corrosion coatings? The following PE powder manufacturers understand everyone, I hope to help you.


1, phenolic resin coating


There are mainly alcohol-soluble phenolic resins, modified phenolic resins, and pure phenolic resins. The alcohol-soluble phenolic resin coating has good corrosion resistance, but the construction is inconvenient, the flexibility and the adhesion are not so good, and the application is limited. Therefore, it is often necessary to modify the phenolic resin. Such as rosin modified phenolic resin and tung oil refining, adding various pigments, grinding can produce a variety of enamel, its film is tough, low price, widely used in furniture, door and window coating. Pure phenolic resin coating has strong adhesion, water and moisture resistance, corrosion resistance and weather resistance.


2, epoxy resin coating


Epoxy coating has good adhesion and excellent adhesion to metal, concrete, wood, glass, etc.; alkali resistance, oil and water, excellent electrical insulation properties. However, the anti-aging properties are poor. Epoxy anticorrosive coatings usually consist of two components, an epoxy resin and a curing agent. The nature of the curing agent also affects the properties of the film. The epoxy ester resin coating is a one-component coating system using an epoxy ester resin as a film former. The epoxy ester resin is a combination of an epoxy resin and a vegetable oil fatty acid ester. The coating is less expensive and less resistant to alkali than conventional epoxy coatings. Commonly used as a variety of metal primers and chemical plant outdoor equipment anti-corrosion paint.


3, polyurethane coating plastic powder processing


Polyurethane resins used in anti-corrosion coatings often contain two components: isocyanate-NCO and hydroxyl. When used, the two components are mixed and reacted to form a polyurethane (polyurethane).


4, grease coating


Grease coatings are a type of coating that uses dry oil as the main film former. Its characteristics are easy to produce, good paintability, good wettability to the surface, low cost, flexible film; but the film is slow to dry, soft film, poor mechanical properties, acid and alkali resistance, water resistance and resistance Poor organic solvent. Dry oils are often combined with anti-rust pigments to form anti-corrosive paints for use in atmospheric environments where corrosion resistance is not critical.


5, national paint


Raw lacquer, also known as raw lacquer and lacquer, is one of China's specialties. Raw lacquer is a milky white viscous liquid that flows out of the growing bark and is filtered through a fine cloth to remove impurities. After it is applied to the surface of the object, the color changes rapidly from white to red, from red to purple, and the longer it becomes a hard and bright black paint film. The national paint has strong adhesion, the film is tough and has good gloss. It is resistant to soil corrosion and is more resistant to water and oil. The disadvantage is that it is toxic and easily causes skin irritation. In addition, it is not resistant to strong oxidants and has poor alkali resistance.


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