If properly sealed, chromic acid anodize affords the aluminum equivalent to corrosion protection to the relatively thick sulfuric and Hardcoat type anodize.
Furthermore, metal leaves are also employed in repair work, particularly in antique restoration. In instances where a piece of a metal object has corroded or broken off, a metal leaf can be skillfully welded into place, mimicking the original design while reinforcing the structure. This technique demands great finesse and respect for the original aesthetics.