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Question: We currently have a five-stage zinc phosphate washer and are powder coating various metal parts for original equipment manufacturers.

Any recommendations on how we can easily remove fluoride without major modifications to our pretreatment system?

Originally published in 1978, this paper was the first of several on AES Research Project #41, a study of plating on aluminum, at the National Institute for Science and Technology.  A review of immersion pretreatments for the plating on aluminum is presented.  The zincate pretreatments dominate the literature, but innovations were reported which offer improved adhesion and corrosion performance.  Finally, an updated bio on Dr. Lashmore’s work through the years is offered.

The aim of this research is to seek a sulfur-free plating solution for electro-codeposition of (Ni,Co)-CrAlY composite coatings.  In this quarter, the coating plated in the sulfur-free, all-chloride plating solution with sodium lauryl sulfate wetting agent showed the best oxidation performance. This coating also demonstrated much better oxidation resistance that the bare CMSX-4 alloy.

What do you think about iron phosphatizing and wastewater issues?

This is the third of three combined papers that received the AESF Gold Medal Award for Best Paper published in Plating & Surface Finishing in 1989.  Insulating shields and baffles redirect the flow of current and affect the thickness distribution of chromium and other electrodeposits. Many examples of these useful devices for improving the uniformity of chromium deposits are described.

Whelen Engineering was among the thousands of OEMs that sourced its printed circuit boards from Asia until increasing costs led the company to build—greenfield and in-house—America’s first new rigid PCB shop in 15 years.

Question: I am inquiring about your answer to the question Chemfilm Disposal , published in the September 2004 issue.

Q. Our paint shop is the place of highest energy consumption and highest VOC and CO2 emissions in the car manufacturing process. What measures can be taken to reduce them?