Galvanized :
Because zinc is not easy to change in dry air, but in humid air, a very dense basic zinc carbonate film can be formed on the surface, which can effectively protect the interior from corrosion. And when for some reason, the coating is damaged and the steel base is not too large, the zinc and the steel base form a micro-battery, making the steel base a cathode and protected.
Hot-dip galvanizing
Among various coating methods for protecting steel substrates, hot-dip galvanizing is a very good one. It is in the liquid state of zinc, after quite complex physical and chemical effects, not only a thicker layer of pure zinc is plated on the steel, but also a zinc-iron alloy layer is formed. This plating method not only has the corrosion resistance characteristics of electro-galvanizing, but also has a zinc-iron alloy layer. It also has strong corrosion resistance that cannot be compared with electro-galvanized. Therefore, this plating method is especially suitable for strong corrosive environments such as various strong acids and alkali mist.