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Yellow Chromate |
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The Yellow Chromate is a yellow/bronze iridescent finish on plated cadmium and zinc. Liquid concentrate is used at 0.5% to 3% by volume in water at 65° to 90°F. The finish has outstanding resistance to salt spray, greatly surpasses the normal 96 hour salt spray resistance specified for yellow chromates on zinc. It will withstand up to 200 hours salt spray. The deposit is a pleasing finish in itself. It is an excellent base for paint.
After preparing the part to accept the process, the part is simply dipped into a solution for a few minutes. The zinc & the chromate react to form the new colours. To improve those older zinc (pot metal) castings, plate with a fresh zinc plate before chromating. Steel parts that have been previously plated with zinc can be chromated with no further pre-treatment. Zinc alloy die cast parts may be surface activated by immersion in a weak acid. Full operating instructions are in the manual. |
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