Which is better, plastic-coated barbed wire or galvanized barbed wire?

For the surface treatment of the barbed wire, should I choose a plastic coated barbed wire or a galvanized barbed wire?

The chemical activity of zinc is higher than that of iron. When electrochemical corrosion occurs, zinc is corroded first instead of iron. The oxide of zinc is denser and can prevent further oxidation. Therefore, galvanized barbed wire has better corrosion resistance. (One thing to note is that galvanizing should be hot-dip galvanized instead of electro-galvanized);

Coating is to form a layer of polymer plastic protective film on the outer surface of the iron wire of the barbed wire. However, because the process of plasticizing the barbed wire is made after coating, the section of the barbed wire is exposed with the wire, if it is hot galvanized point. In actual use, the section may be corroded after being washed by rain, so the service life of the plastic-coated barbed wire will be shortened.

The above is a simple explanation, the specific choice of plastic-coated barbed wire or galvanized barbed wire depends on your environment and venue.