Pretreatments
Ultrafiltration in Electrocoating Becoming Critical
UF it closes the mass balance of the process while producing rinse waters from the electrocoat paint bath, often resulting in 95 percent or higher transfer efficiencies with no net water addition.
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Powder Coating Training Class is Aug. 14-15
Parker Ionics hosts PCI training course in Westland, Michigan
Read MorePowder on Galvaneal
We have customers that want a smooth powder coating on a galvaneal finish. We prep with a light alcohol wipe, prebake the parts to allow for off-gassing, then spray with a smooth powder. We are having problems with “craters” and specs, so the surfaces won’t pass a class “A” test. Is there a way to coat a galvaneal part with a smooth powder that does not have a special additive?
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An Introduction to Cyclic Corrosion Testing
A more realistic way to perform salt spray tests.
Read MorePerformance Testing
We powder coat thicker gauges of steel (10-gauge to ¼-inch plate), using a blast operation for some of the heavier parts. We want to test the parts to confirm proper pretreatment coating performance before shipment, but we have some problems with impact and conical mandrel bend testing. The aggressive reaction of the washer chemistry can cause flash rust or other problems on the lightweight panels needed for the bend tests. Is there some way to create a bend test for our heavier materials? How can we confirm that our pretreatment and powder are working correctly?
Read MoreStreaks in Coating
We apply a medium-gloss gray powder on our parts at around 3 to 4 mils thickness. Sometimes our operators leave streaks on the parts when they apply the powder, and some areas are darker than others before cure and clearly visible after cure. What is causing the streaks, and how can we fix the problem so we do not get them?
Read MoreAsk The Expert: Streaks in Powder Coating
Q: We apply a medium-gloss gray powder on our parts at around 3 to 4 mils thickness. Sometimes our operators leave streaks on the parts when they apply the powder.
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Ask The Expert: Clean Paraffin Wax Die Lube
Q. We are a general purpose coating house. Our cleaning line consists of an alkaline cleaner, city water rinse, iron phosphate, sealer, RO rinse then RO halo.
Read MoreCorrosion Data on Galvanneal Steel
Do you have any data comparing corrosion performance between galvanneal and pickled hot-rolled steel?
Read MoreZinc–Rich Primer Over Zinc Plating
Is it possible to replace a current process of zinc plating with a zinc paint process on a steel chassis? Also, can zinc paint be powder coated afterwards?
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