Galvanized cable trays are cable support systems fabricated from steel trays that undergo galvanizing corrosion protection treatment. They are primarily categorized into two types based on the production process: hot-dip galvanizing (hot-dip zinc) and electro-galvanizing (cold galvanizing). Widely utilized for cable laying in construction, power engineering, and chemical industry sectors, they serve as a reliable solution for diverse cable management needs.

 

Galvanized cable trays achieve corrosion resistance by coating the steel surface with a zinc layer and are classified into two main categories according to the galvanizing process:

 

 

Steel components, after thorough rust removal, are submerged in molten zinc at a temperature of 450–600℃. This process forms a composite structure composed of a zinc-iron alloy layer and a pure zinc layer on the steel surface. The zinc layer typically has a thickness of ≥65μm, endowing the tray with excellent corrosion resistance and a service life of 15–20 years or more. It is especially suitable for deployment in harsh environments such as coastal areas and chemical industry facilities where corrosion risks are high.

 

 

A zinc layer is deposited on the steel surface via electrochemical deposition. The zinc layer is relatively thin, usually ranging from 5–15μm, resulting in a shorter corrosion-resistant service life of approximately 12 years. This type of galvanized cable tray is more cost-effective and better suited for indoor applications or environments with mild corrosive conditions.

 

 

Galvanized cable trays are mainly available in three structural styles: slot-type, tray-type, and ladder-type. Their specifications are uniformly denoted as width × height × thickness. Common parameter ranges include:

 

 

Market prices of galvanized cable trays are significantly affected by specifications, raw material quality, manufacturing craftsmanship, and zinc layer thickness. For example, hot-dip galvanized cable trays, which involve complex production processes and thicker zinc layers, generally command a higher price compared to electro-galvanized products.