Carl Izzo Consultant

Liquid Coating

Accelerated Tests vs. Service Life

We manufacture coated pipe products, and I’ve been asked to come up with a guaranteed lifetime period for a “Single Wall Steel Tube” pipe having a coating that is 25 microns thick. The coating withstood the CASS test for 60 hrs. How many years it will with stand up in the field?

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Liquid Coating

Protecting Brass

I have had customer complaints about the clear coat peeling and corrosion problems on solid-brass numerals for house identification. Can you give any tips on how to polish the brass and protect it for years to come?

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Liquid Coating

Fish Eyes

I recently have been having a problem with fish eyes when spraying epoxy paint, Mil PRF-22750F, FED color #24052.

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Electroplating

Adhesion to Electroless Nickel

Is there a process to improve paint adhesion to a high-phosphate, nickel-plated surface?

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Liquid Coating

Black Coating for Steel

Do you have any suggestions on what solutions we might explore for black coating steel?

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Liquid Coating

Phosphatizing Powdered Metal Parts

My company makes powdered metal parts that are pressed to shape from metal powders to a density of 6.0 to 6.5 g/cc. The parts are then manganese-phosphate coated, and the phosphate coating does not always have a dark, even appearance, but is mottled. This has been attributed to the high copper content of the powdered metal parts. What do you think?

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Liquid Coating

Painting Iron Castings

We are having paint adhesion failures on the centrifuges’ rotating hub, which is made of iron. Our customers have been complaining that after a couple of weeks of operation, the paint peels off the hubs and then rust takes over. What can we do to correct this problem?

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Liquid Coating

Solvent Attack on Plastic

Can you suggest a) a paint that is ductile-plastic-friendly, b) a surface treatment that may later be painted or c) another flexible, abrasion-resistant coating for this purpose that won’t weaken the plastic?

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Q: Best type of polymer for a baking enamel?

Carl Izzo has the answer to this question and many others

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Liquid Coating

Latex Spraying Revisited

I read the letter from G.S. in the August issue concerning the spraying of a latex.

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Parts Cleaning

Solving Intercoat Adhesion Problems

When a part is rejected because of a paint defect, we try to recoat it, but the second coat won’t adhere to the first, causing us problems. What is the best type of polymer for a baking enamel that allows it to be recoated with excellent adhesion?

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Liquid Coating

Coat the I-Beam with Parylene

Q. Let me suggest another alternative to your suggestions for treating the piece of steel from the World Trade Center, described in the September issue.

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