Anodizing successfully combines science with nature to create one of the world's best metal finishes.
It is an electrochemical process that thickens and toughens the naturally occurring protective oxide. The resulting finish, depending on the process, is the second hardest substance known to man, second only to the diamond. The anodic coating is part of the metal, but has a porous structure which allows secondary infusions, (i.e. organic and inorganic coloring, lubricity aids, etc.)
It is an electrochemical process that thickens and toughens the naturally occurring protective oxide. The resulting finish, depending on the process, is the second hardest substance known to man, second only to the diamond. The anodic coating is part of the metal, but has a porous structure which allows secondary infusions, (i.e. organic and inorganic coloring, lubricity aids, etc.)
Appearance options and quality are improved through the use of dyes and
special pretreatment procedures. This makes the aluminum look like
pewter, stainless steel, copper, brushed bronze or polished brass and
can also be colored with brilliant blues, greens, reds, and many
varieties of metallic gold and silver.
From http://www.hai.dk/
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