Galvanized or Coated spring, what is better?
There is no such thing as a coated spring. The term is often used in reference to coating with paint. A standard oil tempered spring is coated with a poor quality paint product. Lasting a short time. Galvanizing by definition means a metallurgical reaction between zinc and iron to create a bond between the zinc and the steel of approximately 3600 psi. There is no such reaction when paints are applied and the bond strength is only a painting system.