Duplex Coating Rock Bolt

Description:
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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Introduction

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.

Functions:
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.

Conditions:
• 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.
3. Its anti-corrosion of the combination of two methods can keep more than 100 years.

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

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