Duplex Coating Rock Bolt

Duplex coating rock bolt is a supporting method with better anti-corrosion effect, which combines hot-dip galvanizing method with epoxy coating method together, which hardens the surface and prevents coating from peeling off.

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Duplex coating rock bolt adopts two corrosion-prevention measurements on the bolt surface, hot-dip galvanizing and epoxy coating which can prevent corrosion very well.

It can be isolated with water and air to prevent the chemical etching and the rusting. So the preservative effect is very well as a permanent support. It is applied to conditions which are influenced by underground water such as road, railway, water conservancy project, sub-sea tunnel, etc.

• Road
• Railway
• Water Conservancy Project
• Sub-sea Tunnel

Features and advantages:
1. Thick hot-dip galvanizing coating, dense combination, high anti-corrosion and good toughness.
2. Benefits of epoxy coating:
1) High adhesive force to the steel substrate.
2) Excellent physical properties and chemical stability.
3) Excellent toughness and wear resistance.
4) A wide range of temperature adaptability.
5) Fine insulation and resisting anode dissolution.

Technical Data:
Size Ultimate Tensile Strength (KN) Yield Strength (KN) Hot-dip galvanized zinc
coating thickness(μm)
Epoxy Layer Thickness (μm) Excecutive
R32N 280 230 ≥70 ≥60 1.Hot-dip galvanizing: ISO1461
2.Epoxy Layer: ISO1519

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