| 摘要 |
<p>Powders of milleable metal, particularly zinc, are milled with a dry solid lubricant to form flakes. The final product is obtained much more cheaply than with conventional flaking processes, has a low apparent density and, when the metal is zinc and is incorporated into a corrosion resistant coating, provides a superior product to one produced with conventional zinc powders. In particular, there is a reduced ratio of zinc pigment to binder. The solid lubricants are inorganic lubricants particularly carbon such as graphite or organic lubricants such as film-forming polymers for example polyfluoroethylenes but not materials with surface active groups, e.g. soaps. Where the metal is zinc and the lubricant is graphite or carbon black, the lubricant may be incorporated into the lattice structure of the metal to provide a new form of zinc flake.</p> |
