Parts Cleaning
Troubleshooting the Pretreatment and Paint Process
We had finished parts sectioned, mounted, polished and examined under a microscope with the hopes of identifying deficiencies within our coating system that cause premature failure. One of the items brought up are oxides trapped within scratches and scale texture under the e-coat. The substrate is hot-rolled-steel (recycled steel) bar that has been steel shot blasted then put through the standard cleaning process prior to e-coating. Have you ever heard of or seen steel shot blasting driving oxides into small crevices or texturing natural to hot-rolled steel? We cannot seem to figure out why these oxides are still present after shot blast and pickling.
Read MoreASK AN EXPERT: Corrision Resistance
Q. What should we change to enhance our salt spray results?
Read MoreOptions for Outdoors
We want to provide more powder coated products for outdoor use, but we do not want to get into zinc phosphate or chrome. Can we achieve good results on steel parts if we use a primer, and if so, how do we need to process the parts?
Read MoreWhy Use Epoxy Primer?
We have been applying a two-package epoxy primer and then a polyurethane topcoat to our products.
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?
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Just How Clean Is Clean?
Most finishing consultants have lost count of the number of times that inadequate cleaning and pretreatment was the cause of defective painting or plating. Skip plating, blistering, delamination—these are just some of the commonly found defects caused by poor cleaning.
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Solvon Meeting Military Inspection
Poly Systems in Deer Park, NY has released an updated version of its Solvon FB cleaning solvent blends consisting of a high-purity, patented combination of n-propyl bromide and pentafluorobutane.
Read MoreTackoff: In Pursuit of the Perfect Paint Job
When it comes to today’s vehicles, a high quality paint finish is the first thing a consumer notices. The automotive industry is constantly improving its paint shop either by upgrading existing facilities or by building new ones to take advantage of the latest technology available. But manufacturers also go to extraordinary measures to prepare the vehicle’s surface before it is painted, including making sure the surface is clean and ready to absorb a coating.
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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 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?
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