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Oxsilan 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 informa...
Ask an Expert Published: 5/31/2012
Pretreatment of Carbon Composites
Is there a type of chemical bath or similar option that carbon composites can be processed through to improve paint adhesion?
Ask an Expert Published: 5/30/2012
Multi-Metal Pretreatment
I need to clean steel, aluminum and steel castings, steel forgings, electrogalvanized and galvanneal sheet, and aluminum sheet metal parts for an e-coat application. Presently, we use Parco 305 (Henkel), but results are variable. The finish on the g...
Ask an Expert Published: 3/22/2012
Corrosion Under Powder Coating
We’re facing problems in powder coating on sheets of cold-rolled closed annealed parts. We found that, after some days, the color is peeling off, and we have found corrosion beneath that. We do a three-in-one cleaning process and then powder coat at...
Ask an Expert Published: 2/21/2012
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...
Ask an Expert Published: 2/21/2012
Tanks for Citric Acid Passivation
We want to change over to citric acid bath passivation. Can we use the same tanks that we use with nitric acid?
Ask an Expert Published: 12/13/2011

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