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Immersion zinc plating is an electroless (non-electrolytic) coating process that deposits a thin layer of zinc on a less electronegative metal, by immersion in a solution containing a zinc or zincate ions, Zn(OH) 2− 4. A typical use is plating aluminum with zinc prior to electrolytic or electroless nickel plating.
Zinc flake coating is a generic term for the coating technology and this is marketed by the different suppliers under their respective brand names. The companies such as SBILLP , ASAMA GIKEN , Anocote , Cadon , Sundram , generally act as licensors for the individual coating businesses.
The chromate coating acts as paint does, protecting the zinc from white corrosion, thus making the part considerably more durable, depending on the chromate layer's thickness. [ 8 ] [ 9 ] [ 10 ] The protective effect of chromate coatings on zinc is indicated by color, progressing from clear/blue to yellow, gold, olive drab and black.
In 2008, Erie Plating Company employs about 125 employees at its 100,000 square feet (9,300 m 2) central plant, which ranks among the top 40% of the cleanest industrial facilities in the United States according to Scorecard's Environmental Release Survey.
A phosphate coating is usually obtained by applying to the steel part a dilute solution of phosphoric acid, possibly with soluble iron, zinc, and/or manganese salts. The solution may be applied by sponging, spraying, or immersion. [6] Phosphate conversion coatings can also be used on aluminium, zinc, cadmium, silver and tin. [7] [8]
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