Our production line also includes a blackening pole. When the pieces could not go in the shot blasting machine, the first step consists in plunging them into a phosphoric-acid bath. If they went in the shot blasting machine, the first step is to put them into the “washing machine”. Then, the components go through a blend of water and blackening salt. To finish, the parts go from 5 different water baths to a blend anti-rust and anti-corrosion.
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