• Duplex Coating Rock Bolt

Duplex Coating Rock Bolt

  • Size:R32N
  • Ultimate Tensile Strength (KN):280
  • Yield Strength (KN):230

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(1) Introduction:

The 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 is mainly used in conditions which are inflenced by underground water such as road, railway, water conservancy project, subsea tunnel, etc.

(2) Specifications:

Size Ultimate Tensile Strength (KN) Yield Strength
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