Abstract: Liquid aluminum is sprayed onto an iron article to produce a thin tenacious non-corrodible layer. In one embodiment, an iron article is roughened, as by grit blasting, to provide a profile of at least about two mils. The iron article may be maintained at essentially ambient temperature, and is sprayed with a fine aluminum mist generated by heating aluminum in a container and then passing a gas under pressure through the container and out through a heat resistant ceramic nozzle. The aluminum is ideally not heated substantially above its melting point.