Most protective coating systems for steel function solely as a barrier between the steel and the corrosive environment. If these passive and permeable barriers are damaged or penetrated, moisture and oxygen can reach the steel surface, causing rust and eventual coating failure. A zinc metallized coating also offers barrier protection; however, the electrochemical relationship between zinc and steel allows a zinc coating to give cathodic protection as well. A zinc metallized coating will protect the steel galvanically - it will corrode in preference to steel, continuing to protect as long as any zinc remains in the immediate area. The surface of a metallized coating permits excellent adhesion of sealers and topcoats. The effect of this combination is a synergistic coating system which will protect the underlying steel and require little or no maintenance for many years.