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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?
Read MoreProtecting 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?
Read MoreAdhesion to Electroless Nickel
Is there a process to improve paint adhesion to a high-phosphate, nickel-plated surface?
Read MoreBlack Coating for Steel
Do you have any suggestions on what solutions we might explore for black coating steel?
Read MorePhosphatizing 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?
Read MorePainting 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?
Read MoreSolvent 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
Read MoreLatex Spraying Revisited
I read the letter from G.S. in the August issue concerning the spraying of a latex.
Read MoreSolving 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?
Read MoreCoat 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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