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At present, steel surface descaling is the most labor-intensive surface treatment process. ERR is a new anti-rust and anti-corrosion water-based protection system. This system has been adopted by the US Navy and major shipyards. It is a surface treatment method before painting by the American Steel Structure Spraying Committee. ERR can be completely deoxidized and derusted when used in ferrous metals. It forms a primer layer of iron phosphate secondary composite after drying. It has unique and strong anti-corrosion and anti-rust ability. Use ERR to remove rust, the operation is extremely simple. After applying ERR to the metal surface, it will be rusted for 15 minutes. The rust will be reduced to a white powder, which can be removed with a touch. It can be widely used in ships, cars, bridges, machinery. , metallurgy and other industries.