"Electric galvanized' is just another term for 'zinc electroplated'. That means the steel is immersed in an aqueous bath, and electricity is used to move electrons from the anode to the cathode, which induces the zinc anodes to be "oxidized" and dissolve as zinc ions in the aqueous solution, be transported as ions through the solution, and be "reduced" as metal onto the work (the cathode).

In hot dip galvanizing the work is immersed in molten zinc. As it is withdrawn, the zinc cools and forms a coating of zinc on the work.

Hot dip galvanized coatings are almost always several times thicker and therefore several times as corrosion resistant. There are some other practical differences in the two coatings for different applications as well.