Galvanized steel is generally not rusty, because the galvanized steel surface electroplated layer of about 1 mm of metallic zinc steel, corrosion-resistant, widely used in the construction industry, this thin zinc-coated steel is called galvanized sheet. Galvanization is a frequently used economic and effective anti-corrosion method, so galvanized steel is basically not easy to rust.
But in the following cases, galvanized steel is rusty:
1, galvanized steel will rust, according to the galvanized steel in different environments, the reaction is not the same, if long-term galvanized steel in the outdoors, galvanized steel will rust, if the galvanized steel in the indoor, and keep it dry, do not let the galvanized steel stained with water as well as corrosive liquids, then galvanized steel rust time will be extended.
2, galvanized steel is corroded rust is a very normal phenomenon, because galvanized steel contains other impurities, such as iron and zinc and other metals, which can easily produce corrosion effects, resulting in galvanized sheet rust.
3, although it is said that galvanized steel has a certain degree of corrosion resistance, rust resistance, but the ability of galvanized steel is also limited, if the long time it will be placed in harsh environments, all of the steel is rusty.
Galvanized steel is also divided into cold-dip galvanized steel and hot-dip galvanized steel, usually cold-dip galvanized steel is more prone to rust, while hot-dip galvanized steel is not prone to rust.
