David S. Peterson

David S. Peterson

automotive

Cleaning Plastics

Question: We are a third tier automotive supplier for plastic parts like grills, hubcaps and other trim parts.

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Cleaning Copper

Question: Two problems.

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Electroplating

QQ-P-35 Passivation

To the readers: My February 2004 column contained a question and answer regarding passivating to a standard QQ-P-35 (www.pfonline.com/articles/clinics/0204cl_clean2.html). The information below was in response to that column and provides additional background and insight.

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Passivation of 304, 305 and 384 Steel

Question: If this is true then what is recommended?

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Magnesium Treatment Part 2

I just wanted to forward some comments regarding the question on Mg that appeared in the October issue.

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Moly Alloy Cleaning

Question: Does the acid solution used in cleaning Moly cause any embrittlement of the moly?

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Oxygen Service Cleaning

Question: We are a contract manufacturing company in the process of looking for a supplier in the Northeast that provides the service of cleaning aluminum and brass machine parts to a CGA spec, CGA G-4.1.

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Sealer Elimination

Question: I work as a paint line manufacturing engineer in London.

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Laser Scale Removal

Question: I am interested in removing laser scale from CRS.

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Cleaning Dry Film Lubricants

Question: I have a 0.009-inch inner diameter tube that is six feet long.

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Zinc vs. Iron Phosphate Revisited

Question: I completely agree with your comments (Zinc vs.

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