Parts Cleaning
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.
Read More
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?
Read MorePowder Coating Pretreatment
How do you recommend we clean a paraffin wax die lube from a cast aluminum substrate?
Read MoreOxsilan Pretreatment Revisited
In my August 2011 column, I responded to a question regarding the benefits of Chemetall’s Oxsilan pretreatment process versus more conventional iron and zinc phosphate pretreatments. Chemetall product manager Gary Nelson has provided further information.
Read MorePretreatment of Carbon Composites
Is there a type of chemical bath or similar option that carbon composites can be processed through to improve paint adhesion?
Read More
