Arthur S. Kushner

Arthur S. Kushner Consultant

Pinholes and Electroless Nickel

Question: What causes pinholes in electroless nickel deposits?

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Zinc Plated Zinc Diecasts Turn Blue

Question: We plate zinc diecasts with zinc.

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Bright Nickel Sulfamate Plating

Question: We do electroforming using nickel sulfamate plating baths.

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Stripping Defective Copper Plate

Question: What is the best way to strip copper from steel?

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Chromium Plating Bath Purification Revisited

Question: What are some of the ways to maintain the purity of a hexavalent chromium plating bath?

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Small Scale Zinc Plating

Question: In my spare time I like to do restoration work on automobiles.

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Copper in a Nickel Plating Bath

Question: We use a Watts bright nickel plating bath and have recently noticed a grayish color in the low current density areas of our parts.

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Chromate Color Change

Question: We use a blue-bright type chromate on parts that are plated in an alkaline, non-cyanide zinc bath.

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Cadmium and Chromium Substitutes

Question: Where can I find some up-to-date information on various substitutes for cadmium and chromium?

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Mixed Parts

Question: We specialize in decorative chromium using the classic copper/nickel/bright nickel/chromium process.

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Chromate Conversion Coatings and Temperature Revisited

Another reader pointed out that the QQ-P-416, Type II, Class 2 specification clearly states that the conversion coating is not intended for long-term exposure to temperatures over 150F or to intermittent exposure over 300F.

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Yellow Badge of Courage

Question: What is the best way to remove the yellow stains that some of my chrome platers acquire during the workday?

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