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What is a VCI bimetallic coated cable tray

Optical network knowledge brief Published 31 Aug 2022

Prepared for preliminary research by the COETZER OPTICAL knowledge desk. Confirm compatibility, loss budgets and installation requirements against current standards and product documentation.

A VCI bimetallic coated cable tray is a corrosion-resistant cable management system that combines two metals with a vapor corrosion inhibitor (VCI) coating to protect electrical circuits in harsh environments.Overview

A VCI bimetallic coated cable tray is designed to provide superior corrosion protection by combining the benefits of two metals with a specialized VCI (Vapor Corrosion Inhibitor) coating. This makes it highly suitable for environments with high humidity, chemical exposure, or salt-laden air, such as basements, tunnels, mines, chemical plants, marine areas, and coastal regions .

Composition and Coating

The bimetallic coating typically includes:

  • Zinc powder (20–40 parts) and aluminum powder (10–20 parts) for corrosion resistance
  • Binder (30–50 parts), often a pre-hydrolyzed siloxane, which ensures strong adhesion to the metal substrate
  • VCI sustained-release agent (5–15 parts) that continuously releases corrosion-inhibiting molecules The VCI coating forms a dense, protective layer that adheres tightly to the metal surface, providing cathodic protection and self-repairing minor surface damage. It also allows for additional organic coatings to enhance resistance against acids, alkalis, and heavy chemical corrosion .
Advantages
  • High corrosion resistance: Protects against rust, salt spray, and chemical erosion
  • Durability: Extends the service life of cable trays in harsh environments
  • Environmental safety: Non-toxic, odorless, and environmentally friendly coating
  • Mechanical strength: Maintains high load-bearing capacity while providing long-term protection
  • Self-repairing: Minor scratches or surface damage are mitigated by the VCI effect
Applications

VCI bimetallic coated cable trays are widely used in:

  • Industrial facilities: Chemical plants, oil and gas industries
  • Marine and coastal installations: Ports, offshore platforms
  • Power and telecommunications: Substations, data centers, and power stations
  • Special environments: Food processing plants or areas requiring strict hygiene and corrosion control
Summary

In essence, a VCI bimetallic coated cable tray is a high-performance cable management solution that combines the structural benefits of two metals with advanced VCI technology. It ensures long-term protection of electrical circuits in corrosive or high-humidity environments, making it a reliable and cost-effective choice for industrial, marine, and chemical applications .

What is a VCI bimetallic coated cable tray - COETZER OPTICAL SYSTEMS (Pty) Ltd [PDF]

What is a VCI bimetallic coated cable tray

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