Zama chromium plating12/16/2023 ![]() ![]() ![]() The present invention provides an improvement over such prior art techniques by providing a trivalent chromium electrolyte which is more tolerant to the presence of one or more of such contaminating metal ions or organic contaminants masking or hiding their deleterious effects thereby providing for a longer useful operating life of the bath under normal commercial operating conditions. Similarly, excessive organic contaminants can give rise to the presence of white streaks thereby flawing the resulting deposit. ![]() When one or more of such metal ion impurities attain concentration levels in which they are present in even relatively trace quantities, the chromium electrodeposit is adversely affected by the presence of black streaks, clouds and hazes which are sometimes further accompanied by a loss or reduction in covering power rendering such chromium electrodeposits commercially unsatisfactory. The present invention relates to improved trivalent chromium electrolytes, and more particularly to an improved trivalent chromium electrolyte composition which is substantially more tolerant to the presence of deleterious contaminating metal ions such as nickel, zinc, iron, copper and lead as well as organic contaminants such as excess organic wetting agents or brighteners, which accumulate and progressively increase in concentration during normal commercial operation of the plating bath.
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