1. Hand derusting:
scraper, wire brush, grinding wheel etc. can be used. Hand derusting can remove
rust & scale cinder on the member surface. But it has high labor intensity
and low efficiency, the derusting quality can not be ensured.
derusting: acidic or alkaline solution can be used to chemically react with oil
dirty, rust, scale cinder etc. on the member surface and dissolve them in the
acidic or alkaline solution. But because of environmental protection, this way
3. Physical derusting:
sand blasting and shot blasting are mainly included. Shot blasting is a method
of using centrifugal force to accelerate the iron shot to project to the
surface of steel member in order to remove the rust and scale cinder. This way
is encouraged because of little pollution.