Parts Cleaning
Solving 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 MoreTanks 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?
Read MoreAluminum Pretreatment for Paint
I am trying to clean and scuff (sand) primed aluminum to prepare for painting. An equipment supplier suggested trying shaved dry ice with a low percentage of particulate like nut shells or baking soda. The dry ice supplier we use does not provide that material. Have you heard of this treatment and do you know of a supplier of this material?
Read MoreCaustic Effect On Zinc-Coated Steel
Can you tell me whether caustic soda will dissolve the zinc coating on zinc-coated steel?
Read MoreCopper Plateback
We have a rack line where we run our zinc and tin plating, and we are noticing when soaking copper parts, in our alkaline soak cleaner, that our steel parts will acquire a dark film on them, when removed from the soak, to go into the electrocleaner. What would be causing this?
Read MoreAdhesion to Zinc
We tried washing the part with an iron phosphate wash, and it helped some, but we still did not get 100-percent adhesion. Can anything be done to the part to get the topcoat to adhere?
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"A Step Beyond Clean" show is Oct. 18-20 in CT.
Dow SAFECHEM, Hubbard-Hall and Pero team together for demonstrations on next generation, emission-less cleaning machines
Read MoreStripping of Plated Finishes
The processes, chemicals and equipment, plus control and troubleshooting.
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