The coating's thickness is variable, meaning to say it can be sprayedon at thickness as thin as .5 mil or as high as 4 mils. Coating requiring milsthicker than 6 mils are recommended to be layered with multiple passes.  

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Zinc, Zn/Al, and Aluminum metal coatings are anodic to steel.Galvanizing and Arc Sprayed Coatings protect steel exactly the same way: theyprovide a protective anodic layer over thesteel. Since the coatings are anodic, they will sacrifice themselves to absorbthe corrosion that nature intended for the steel. Arc spraying coatings differ slightly fromgalvanizing as they produce a more porous and more pure coating,  whereas galvanizing tends to absorb iron intothe coating.  There is no iron in the arcsprayed coating. Additionally, theporous arc sprayed coating readily accepts sealer coatings.  The sealer will penetrate the coating, minimize exposure, and slowdown the dissolution process caused during the galvanic corrosion protection ofsteel. The net result: the arcsprayed coating life is extended way beyond that expected for galvanizing, and theamount of zinc exposed for dissolution is controlled by the sealer to allowmore than 50 years of corrosion protection to steel. Aluminum or zinc aluminum alloys alsoprovide galvanic protection to steel. These materials can provide longer lifeprotection in a very aggressive corrosionenvironment. The dissolution of these materials are less than pure zinc; however,in the more aggressive anodic couple, they provide ample protection to steel.