Iron products are common metal products in our life, iron products appear everywhere in our life, but there is a big problem in using iron products, iron products will appear rust, every time rust occurs, will affect the use and appearance of iron products. Nonmetal coating: clean and dry the surface of iron and steel products, and then coat with a layer of protective materials, such as oil, mineral grease, antirust grease, plastic, paint, etc.
There are two kinds of electrochemical protection. One is to connect a piece of metal that is slightly more vivid than it. For example, a ship will be inlaid with zinc, which is slightly more vivid than iron. The second is to connect the negative power supply, such as iron and steel river gate is often connected with the negative power supply, through the negative pole. Its methods include: metal cover film such as electroplating, organic coating such as paint, conversion layer such as hair blue or black, new elements to change the metal structure.
Temporary rust prevention is to guard against the completion of the protective layer mission, to be removed. The methods include: coaxing corrosion inhibitor, coating antirust oil, stripping component plastic, drying air, vacuuming, etc. Change the internal structure of metal: add chromium, nickel and other alloy elements made of stainless steel, but the alloy is not much, expensive, difficult to produce widespread application.
Industrial rust prevention method: coated with asphalt, iron roof, coated with asphalt, you can prevent rust. Add metal coating: some metal surface will form a dense oxide film, the metal surface can be coated with this metal cover layer. For example: galvanized iron, tinplate tin, bicycle rims and some medical equipment are coated with chromium and nickel.
Post time: 11-04-22