Design of steel structures against corrosion (I)

 Design related to different structural elements

Anti-corrosion Coating

1. The friction surface of high-strength bolt connection should be processed strictly according to the design requirements, and ensure that the anti-slip coefficient meets the requirements of the bearing capacity, without special requirements, its rust removal level should be the same as the rust removal level of the main material.

2. When the connection is in the open air or in a moderately corrosive environment, the friction surface after descaling should be coated with inorganic zinc-rich primer or zinc plus primer coating level structure, and the thickness of the coating should not be less than 70μ.

3. Common bolts in moderately corrosive environments shall be galvanized bolts.

4. The buried part of the steel column foot should be wrapped with dense concrete of strength class not less than C20 (the thickness of the protective layer should not be less than 50mm), and not less than 50mm above the indoor ground.

5. Higher than the outdoor ground or may accumulate water work indoor ground should be not less than 150mm, the top joints should be corrosion-resistant sealant sealing.

6. When the corrosive grade is strong, steel column column feet and steel columns should be used C25 fine stone concrete parcel, concrete thickness of not less than 60mm, parcel height of not less than 800mm, the top surface of the 30 ° outside the slope.



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