Question 13:
The process of removal of oxide or
dust on the article to be electroplated
is known as
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Pickling is a metal surface treatment used to remove impurities, such as stains, inorganic contaminants, rust or scale from ferrous metals, copper, precious metals and aluminum alloys. ...
Metal surfaces can contain impurities that may affect usage of the product or further processing like plating with metal or painting.
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