Methods of removing rust chemistry are as follows:

1. Fe2O3+6HCl=2FeCl3+3H2O. use hydrochloric acid to remove rust.

2, Fe2O3 + 3H2SO4 = Fe2 (SO4) 3 + 3H2O. with sulfuric acid to remove rust.

3,Fe2O3+6HNO3=2Fe(NO3)3+3H2O. use nitric acid to remove rust.

Rust is an oxide of iron that appears as a reddish brown powder. It is produced by iron being oxidized in a humid environment. Rust not only roughens the surface of iron but also corrodes it and causes it to break. Therefore, proper methods must be taken to remove rust.

Physical methods can be used to remove rust. For example, abrasives such as sandpaper and steel wool balls can be used to remove rust. These abrasives are able to create friction with the rust so that the rust is rubbed off. However, you need to be careful to protect your skin and eyes from being scratched by the abrasives when using physical methods.

Rust remover use precautions:

1, the product must be stirred well before use (without diluent).

2, in order to achieve better rust removal effect, soak or spray brush before removing the surface of the substrate loose floating rust, rupture oxide skin, welding slag, soil, oil and dirt, and then treated with rust remover.

3, soak the rust, if the bottom of the soaking tank has sediment, should be removed in time; when the ability to remove rust decreases, you can add 10% of the liquid volume of the tank rust remover as appropriate, so repeatedly, without having to add water to dilute.