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Rust cleaning is necessary for steel structure workshop

The main material used in a steel structure workshop is steel. Since the steel will be rusted during use, rust cleaning is necessary for all the steel structure workshops
1, the steel surface corrosion and rust cleaning for steel structure workshop should refer to national standard GB8923-88 "steel coating surface corrosion rating and rust rating."
2, There are three derusting grades in steel structure workshop standard: compressed-air  or centrifugal blast cleaning, manual and electric derusting, flame descaling.
3. Compressed-air or centrifugal blast cleaning is represented by the letter “sa” and is divided into four levels:
Sa1 - Mild. The steel surface is free of visible grease, dirt, loose oxide skin, rust and paint coating.
Sa2 - Thorough. There are no visible grease, dirt, oxide skin, rust, etc. on the steel surface, all the attachments are basically removed.
Sa21/2 – Totally thorough. There are no visible deposits of grease, dirt, oxide skin, rust and paint coating on the steel surface. The residue traces are only slight spots with dots or stripes.
Sa3 - Compressed-air or centrifugal blast cleaning that can exactly clean the steel surface. The steel surface is free of visible deposits of grease, dirt, oxide skin, rust and paint coating, and the surface exhibits a uniform metallic color.
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