What are the purposes of spraying PFA coating on chemical equipment

Source：www.marydick.cn Release date： 2025年02月17日

Information summary：PFA (Fusible Polytetrafluoroethylene) is a high-performance fluorinated plastic. Spraying PFA coating on chemical equipment has multiple uses, as follows: 1. Corrosion prevention: Chemical production often comes into contact with various highly corrosive chemicals, such as sulfuric acid, hydrochloric acid, nitric acid, sodium hydroxide and other acid-base solutions. PFA coating has good chemical

PFA (Fusible Polytetrafluoroethylene) is a high-performance fluorinated plastic. Spraying PFA coating on chemical equipment has multiple uses, as follows:
1. Corrosion prevention: Chemical production often comes into contact with various highly corrosive chemicals, such as sulfuric acid, hydrochloric acid, nitric acid, sodium hydroxide and other acid-base solutions. PFA coating has good chemical stability and can withstand corrosion from almost all chemical substances. For example, spraying PFA coating on the inner surface of equipment such as reaction vessels and storage tanks can effectively prevent equipment from being corroded by chemical media stored or reacted internally, extend the service life of equipment, and reduce equipment replacement and maintenance costs.
2. Anti sticking: In some chemical production processes, materials may adhere to the inner walls of equipment, affecting production efficiency and product quality, and increasing the difficulty of cleaning. PFA coating has a smooth surface and low surface energy, making it difficult for most substances to adhere to its surface. Spraying PFA coating on equipment such as mixers, pipelines, valves, etc. can reduce material adhesion and scaling, ensure smooth material transportation and normal equipment operation, and also facilitate equipment cleaning and maintenance.
3. High and low temperature resistance: The operating temperature range in chemical production is wide, and PFA coating can be used for a long time in the temperature range of -200 ℃ to 260 ℃, which can withstand extreme high and low temperature environments. For example, in some chemical equipment that requires high-temperature reactions or low-temperature storage, such as high-temperature reactors, low-temperature storage tanks, etc., spraying PFA coating can ensure that the equipment maintains good performance and stability under different temperature conditions, without coating peeling or equipment damage due to temperature changes.
4. Wear resistance: During the operation of some chemical equipment, internal material flow or friction of mechanical components may cause surface wear of the equipment. PFA coating has a certain degree of wear resistance, which can resist the erosion and mechanical friction of material particles and protect the equipment substrate. For example, spraying PFA coating on the inner wall of pipelines transporting fluids containing solid particles can reduce the wear of particles on the inner wall of the pipeline and extend its service life.
5. Insulation: In some chemical production processes involving electrical equipment or the need to prevent static electricity accumulation, the good electrical insulation performance of PFA coating can play an important role. For example, spraying PFA coating on the shells or components of some chemical instruments and electrical equipment can not only protect the equipment from chemical corrosion, but also provide reliable insulation protection to prevent safety accidents caused by leakage and static electricity.
6. Food grade safety: In the production process of some chemical products, it may involve the production of raw materials or products related to food, drugs, etc. PFA coating meets food grade safety standards, is non-toxic and harmless, and will not cause contamination to the product. Therefore, spraying PFA coating on chemical equipment that comes into contact with food and drugs, such as food additive production equipment and pharmaceutical equipment, can ensure the safety and hygiene of the products.

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