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Adhesion 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?
Ask an Expert Published: 10/25/2011
Steam Cleaning/Phosphating
We have been getting field complaints that the paint is peeling off in certain areas even before shipping. Apparently, this is because of insufficient degreasing and phosphating with the manually operated steam cleaner.
Ask an Expert Published: 9/22/2011
Phosphate Bleed Through
All of a sudden we began having problems with the appearance of our coated products. The irregularities in the phosphate coating are telegraphing or bleeding through the paint when the high-solids coating is applied.
Ask an Expert Published: 8/26/2011
World Trade Center I-Beam Preservation
I have been asked to make an honorable artistic memorial for exhibition on the 10th anniversary of the tragedy. For the memorial, a section of the I-beam will be publicly displayed inside an airport, and it may be an open display able to be touched...
Ask an Expert Published: 8/26/2011
Flash Rusting
Our problem is that right after the acid pickle, the tanks flash rust severely before we can get them into the zinc phosphate solution.
Ask an Expert Published: 6/1/2011
Paint Adhesion
Last year at this time we had a large amount of scrap due to paint adhesion failures. Our procedure for metal pretreatment was dip in alkaline cleaner, rinse in cold water and dip in a non-chromate final rinse. To solve this problem, I investigated ...
Ask an Expert Published: 6/1/2011
Cleaning Aluminum
e have been using lacquer thinner to clean aluminum parts before painting. Is this a good practice, and if not, what would be a good low cost replacement?
Ask an Expert Published: 3/31/2011
Repainting Office Furniture
We refinish metal office furniture on-site at the customer’s premises. I read in an article about the problem of using solvents for wax removal prior to painting. We agree that solvent wiping is a poor cleaning method for wax removal, and have had a...
Ask an Expert Published: 2/18/2011
Painting Tank Interiors
Some of the tank interior floors receive a paint touch-up after testing and before shipping because people walk on the inside during the inspection. Recently, I got a customer complaint of soft uncured paint on the tank floor when it was opened for ...
Ask an Expert Published: 2/18/2011
Dust in the Paint Film
We are painting a plastic part using a two-coat system. The problem is that we have a lot of scrap due to what looks like dust in the paint film.
Ask an Expert Published: 2/18/2011

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