Electro-galvanized wire and Hot-dip galvanized wire: Differences in process and applications
After annealed wire is galvanized, it is called galvanized wire. There are many types, mainly divided into two kinds.
▲ Electroplated Zinc Wire and Process
Electro-galvanized wire, also known as cold-galvanized wire, undergoes a process that includes degreasing and pickling, after which the wire is immersed in a solution containing zinc salts. By passing an electric current between the cathode and anode of the electrolytic equipment, zinc is deposited onto the wire. This process has a slower production speed but results in a uniform and relatively thin coating, usually only 3-15 microns thick, with a smooth and bright appearance, though its corrosion resistance is relatively weak. The zinc coating weight of ordinary electro galvanized steel wire is approximately 8-13 grams per square meter. Due to its relatively fast production speed and lower cost, electro-galvanized wire is often used in applications where high corrosion resistance is not required.
▲ Detailed Explanation of Hot-Dip Galvanized Wire Process
Hot-dip galvanizing is a method in which zinc ingots are melted at high temperatures, and iron wire is slowly passed through the molten zinc bath, allowing the zinc to adhere to the surface of the wire. This process has a fast production speed and produces a thicker coating, although it may be uneven. In the market, the zinc coating of hot-dip galvanized wire typically ranges from 30-60 g/m². Its color is relatively dark, but it offers excellent corrosion resistance because a deep diffusion layer forms between the zinc metal and the base metal. Additionally, hot-dip galvanizing involves a higher metal consumption. Hot-dip galvanizing forms a thick coating on the wire by melting zinc ingots at high temperatures, offering excellent corrosion resistance but possibly uneven coating, and is widely used in high-demand applications.
▲ Application Scenarios
Electro-galvanized wire is commonly used in less demanding environments, while galvanized wire rope diameter 70 mm , due to their strong corrosion resistance, are used in high-standard applications such as construction, bridges, and automobile manufacturing. In terms of application, these three types of galvanized wires each have their unique characteristics. Electro-galvanized wire, due to its faster production speed and relatively lower cost, is often used in situations where corrosion resistance is not highly required; whereas hot-dip galvanized wire and zinc-aluminum wire, due to their excellent corrosion resistance, are often used in more demanding scenarios.
Various types of galvanized iron wire each have their own characteristics in terms of tensile strength, elongation, and other properties, and must be chosen according to specific needs. Packaging comes in various forms to suit different transportation and storage requirements. There are mainly two types of packaging: coil wire and spool wire. Common packaging methods include inner plastic with outer jute and inner plastic with outer woven bag. The former refers to the inner layer being wrapped with plastic film and the outer layer with jute cloth, while the latter refers to the inner layer wrapped with plastic film and the outer layer with woven bag. Overall packaging choices include cartons and pallets. In these packaging methods, coil wire is usually carried on pallets, while spool wire is mostly packed in cartons. This choice is mainly based on the characteristics of the two products and customer requirements.
For comprehensive solutions in steel building material, please contact Junnan Steel via email at yy@tsjunnan.com or WhatsApp at (+86) 13780503368 for immediate assistance!
