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Letter 42091
Mechanical Zinc Plating
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We need to know what the chemical analysis of mechanical zinc is.
Karen Kirby
Springfast - Providence, RI
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Mechanically deposited zinc is approximately 95% zinc and 5% tin.
Since the zinc dust is almost always produced by a distillation
process (the Larvik Process) from Special High Grade Zinc, it is
extremely pure. The tin comes from the "Promoter" used in the
process. Underneath the mechanically deposited zinc is (99+% of the
time) a deposit of immersion copper approximately 9 millionths of an
inch thick.
Tom Rochester
Plating
Systems & Technologies, Inc. -
Jackson, Michigan, USA

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