Galvanizing or galvanizing is a manufacturing process in which a coating of zinc is applied to steel or iron to provide protection and prevent rust. There are several galvanizing processes available, but the most common method is hot dip galvanizing. Galvanized steel is one of the most popular steel grades because of its extended durability, the strength and formability of steel, and the corrosion protection of a zinc-iron coating. Zinc protects base metals by acting as a barrier to corrosive elements, and the sacrificial nature of the coating results in long-lasting and high-quality steel products.
This versatility makes galvanized steel suitable for a variety of projects and industries, including agriculture, solar, automotive, construction, and more. Below, we aim to fully describe how galvanized steel is processed, the different galvanizing methods, its benefits, and how it is used in these various industries. The steps of the galvanizing process are as follows: the steel is cleaned in a degreasing solution, after cleaning, the steel is placed in a bucket of diluted hot sulfuric acid for pickling, then the steel is smelted in an aqueous solution (usually zinc ammonium chloride), after fluxing , the steel is galvanized by dipping in a vat of molten zinc, after which the steel is checked for consistency and complete coating.
Many different industries use galvanized steel primarily because it has such a wide range of benefits for the industry to take advantage of, including: Low initial cost compared to most treated steels. In addition, the galvanized steel sheet is ready for use upon delivery. It does not require additional surface preparation, inspection, painting/coating, etc., resulting in additional cost savings for the company.
Galvanized steel has a longer life. By galvanizing, a piece of industrial steel is expected to last over 50 years in the environment and over 20 years under severe water exposure. Maintenance free. The increased durability of the finished steel product also increases the reliability of the product. Any damaged steel is protected by the surrounding zinc coating. It doesn't matter if the steel section is fully exposed; the zinc will still corrode first. The coating will preferentially corrode the steel, providing protection to the damaged area.
The rust resistance of zinc coating of galvanized rolled steel. The iron in steel is extremely susceptible to rusting, but the addition of zinc acts as a protective buffer between the steel and any moisture or oxygen. The galvanised steel sheet is highly protective, including sharp corners and grooves that other coatings cannot, making it resistant to damage.