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Anti-corrosion measures for metal cargo

by:CNS     2021-07-05
Anti-corrosion measures for metal goods 2021-06-20 12:40:59 (1) Anti-rust technology for metal products The anti-rust technology for metal products is mainly aimed at external factors that affect metal corrosion. 1. Control and improve storage conditions The open-air cargo yard for storing metal products should be as far away as possible from industrial and mining areas, especially chemical plants, and should choose a high-lying, water-free and dry site. Metal goods such as more sophisticated hardware tools and parts must be stored in the warehouse, and it is forbidden to store them in the same warehouse with chemical goods or goods with high moisture content. 2. Oil-coated anti-rust Oil-coated anti-rust is a widely used method of anti-rust, that is, spraying or soaking a layer of anti-rust grease film with corrosion inhibition effect on the surface of metal products to prevent corrosive media such as moisture and oxygen from contacting metal materials The surface plays a protective role. Oil-coated anti-rust technology is mostly used in the anti-rust of cutting tools, bearings and automobile and bicycle parts. 3. Paint and rust prevention. For tile wood tools, farm tools, cooking utensils and other inconvenient oil and rust prevention, you can use ester varnish or phenolic novolac plus an equal amount of thinner, dip or paint the metal surface, and then rust can be prevented after drying. . But because the paint film is thin, it can also permeate oxygen and water vapor, so it can only prevent rust for a short time. If the storage conditions are relatively dry and the environment is relatively clean, the anti-rust time can be appropriately extended. 4. Vapor-phase rust prevention: Put some volatile anti-rust agents in the tightly sealed metal product packaging, which will volatilize quickly at room temperature, and the released gas can be absorbed on the surface of the goods and fill every corner of the package. The gap can saturate the space and can prevent or delay the corrosion of the goods. The method has a good anti-rust effect on metal parts, instruments, meters, etc. with complex shapes and structures, does not pollute the packaging, and has a good anti-rust effect and a long time. 5. Anti-rust of peelable plastics Anti-rust of peelable plastics is made by heating or dissolving plastic as a matrix material or film-forming substance, adding mineral oil, plasticizers, stabilizers, corrosion inhibitors, anti-mold agents, etc. Peelable plastic, and then spread it on the metal by dipping, painting, brushing, spraying and other methods. After cooling or the solvent volatilizes, a plastic film is formed to protect the metal from corrosion and scratches. The plastic film can be peeled off when unsealing, which is very convenient. (2) Rust removal technology of metal products 1. Physical method of rust removal Physical method of rust removal is a method of using mechanical friction to remove the rust layer, which is divided into manual rust removal and mechanical rust removal. The manual rust removal method is a method of manually using steel wire brushes, copper wire brushes, sandpaper, emery cloth, etc. to remove the rust layer from the surface of the rust. The mechanical derusting method is to use special mechanical equipment to derust. There are friction wheel derusting method, roller derusting method and sandblasting derusting method. 2. Chemical method of rust removal Chemical method of rust removal is to use acid solution to chemically react with the rust products on the metal surface, so that the insoluble rust products become soluble substances, which are separated from the metal surface and dissolved in the solution to achieve the purpose of rust removal.
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