Buried steel pipe corrosion is to ensure and extend the life of the key procedures, in order to ensure that the anti-corrosion insulation layer and the wall with a solid, pipe rust is the most critical.
Generally according to the factory time, storage of transport conditions, the degree of wet climate, steel pipe rust can be divided into floating rust, rust and rust.
Floating rust: general factory date is shorter, non-open storage, only a small amount of thin rust on the surface of the pipe, can be used wire brush, sandpaper and cotton yarn and other manual operation that exposed metal luster.
Rust and rust: the factory date is longer and open storage or multiple transshipment and transport longer, the pipe surface oxidation rust, the rust is heavy, serious decline in oxide scale.
Severe corrosion of the pipeline is not suitable for sub-water delivery system, the rust pipe and large batch, the use of rust or mechanical sandblasting and other methods of mechanical rust, can improve labor efficiency and reduce the pollution of people and the air.
When the requirements of high corrosion resistance or pipe wall are rusted, the use of chemical rust method, can effectively remove the tube inside and outside the surface of the oxide.
Regardless of which method of rust, should be rusted immediately after the anti-corrosion treatment, to avoid once again by the air oxidation and corrosion.
