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Anti-rust paper fights corrosion in anti-rust process

Modern cars are made up of more than 30,000 parts, and more than 80% of them are metal materials. An important problem with metal is rust. Once a metal part is rusted, it will affect the beauty and lose its function. “The rust is as strong as a tiger”, and rust prevention has become a key link that car parts manufacturers cannot bypass.

When it comes to metal rust prevention, we must first introduce the cause of rust. The chemical or electrochemical reaction of the metal surface causes it to become oxidized, which is what we often call "rusting." There are two reasons for the rust: internal factors, mainly the characteristics of the data itself; external factors, mainly the environment, water, temperature, corrosive substances and mechanical impurities.

Anti-rust operation is also divided into two aspects: First, permanent rust prevention, starting from internal factors: changing internal structure, such as increasing corrosion resistance, stainless steel is; surface covering protective film such as plating and painting; cathodic protection method Such as galvanizing (Zinc will first rust when electrochemical reaction, and avoid parts rust). In general, permanent rust prevention costs are low, such as the non-working surface of parts such as the body shell and engine casing. Permanent rust prevention technology is relatively mature. Widely used in the car industry.

The second is temporary rust prevention, starting with external factors. Some parts are working surfaces, but temporary rust prevention during the process, transportation and storage. Permanent rust prevention will change the performance of the parts. At this time, only temporary rust prevention methods can be adopted. Including the application of anti-rust grease, packaging with anti-rust paper and anti-rust film, vacuum packaging and gas phase anti-rust. The temporary rust prevention method was carried out later, followed by the rise of the military industry and the metallurgical industry, and is now widely used in the metal parts manufacturing industry.