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  • Qingdao Ted Machinery CO.,Ltd.
  • ADD:No.1089,Zhaizishan road,Huangdao District,Qingdao Shandong CHINA
  • Tel: +86-0532-86199296
  • Mob: +8613808977810
  • E-mail:info@qdtedmachine.com
  • Derusting grade of shot blasting machine
    Oct 18, 2017

    The national standard gb8923-88 "pre-coating steel surface modification grade and rust grade" will divide the anti-rust grade of the shot blasting machine into four grades, using the letter "Sa".


    Sa1 light injection or ejection derusting.No oil or dirt on the surface of steel, no adhesion of iron oxide, rust and paint coating.


    Sa2 spray or remove rust thoroughly.The steel surface should be unmet with oil and dirt, oxide skin, rust and other fixtures have been basically cleared, its residue should be a strong attachment.The anti-slip coefficient reached 0.35 ~ 0.45


    Sa2.5 is a very thorough injection or ejection of rust removal.The steel surface should have no visible oil, dirt, oxide, rust, paint coating, etc. Any traces of residue should be only a slight speckle of the dot or stripe.After the surface of the steel was evenly distributed, the anti-slip coefficient reached 0.45 ~ 0.5


    Sa3 allows the steel to be cleansed or sprayed to remove rust.The steel surface should have no visible oil, dirt, oxide, rust, paint, etc. The surface should show the uniform metallic luster.