In the case of a galvanized or new product with traces of rust, it is possible to treat and restore the protection with a cold galvanizing, zinc spray.
There are on the market in fact cans of galvanizing ready for this use that is applied like a normal paint in can.
The spray recreates a corrosion-proof or rust-proof galvanizing, very practical, in fact there is no need to immerse the piece in the zinc-plated anodic bath. This is a quick and cheap solution to restore eg. gates, hollows but also joints of pipes subjected to welding or tanks and pylons.
Other anticorrosive and anti-rust
There is a great quantity of products for every need, among these the category of rust converters, which through a chemical reaction transform the oxidized part of the iron and stop the corrosion.