How can I get rid of the rust on pig iron?
Mechanical derusting is mainly the use of some electric, pneumatic things coming, to clear the purpose of rust. Commonly used electric things, such as electric brush, electric grinding wheel, pneumatic things such as pneumatic brush. Electric and pneumatic brush brush is to use a special circular wire brush around by the impact and friction to clean and remove rust or oxidation skin, especially for surface rust, the effect is good, but it is difficult to get rid of deep rust. In operation, be careful not to punch through the metal surface.
Flame treatment method is the use of a manual gas welding gun to remove deep rust spots, burning red, let the high temperature change of the chemical composition and the oxide rust rust to arrive. Use this method, be careful not to let the metal surface burn through, and prevent large surface heating deformation.
Sandblasting, shot peening method with section removed the old coating application usage.
Chemical treatment is actually a method of acid cleaning and rust removing. It uses acid solution and metal oxide (rust) to produce chemical reaction, which can produce salt and break away from metal surface.Commonly used acidic solutions are: sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid. Operation will be acidic solution coated on the metal rust parts, so that it slowly and rust chemical reaction and removed. Rust removal after the use of clean water erosion, and weak alkaline solution for neutralization and reflection, and then rinse with clean water after drying and drying, in case of rust soon
