Iron is the main element in the alloy steel rigging chain, because iron will rust under the action of oxygen, water and carbon dioxide, so most lifting chains are rust-proofed, which can prevent rust and protect to a certain extent. The service life of the lifting chain.
Some chains use the method of electroplating to protect the chain from rust, such as zinc plating, nickel plating, etc., but the protective film brought by the electroplating to the lifting chain is not strong. With the destruction of this protective film, the chain It will soon be corroded.
Another anti-rust method is to add special elements such as chromium to the steel to maintain a certain content, so that it has just had a good anti-rust ability. For example, when the content of chromium in stainless steel reaches about 12%, it will oxidize to form an oxide film to prevent further corrosion. In addition to chromium, nickel, titanium, copper, molybdenum, nitrogen and other elements are often used in steel.
The lifting chain is cleaned and derusted in time, and the application of anti-rust grease is a common method to avoid the occurrence of rust. In special lifting operations, chain types with strong anti-corrosion ability are often used.
