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Phosphate Pretreatment of Galvanized Steel
We use a seven-tank process that has been working fine for pretreating cold-rolled steel sheet but experience paint-adhesion failures when we pretreat galvanized steel. What must we do to change the process to pretreat GI sheet?
Ask an Expert Published: 10/25/2013
Cleaning Process for Draw Bridge
What cleaning process do you think would work best for our operation of painting various industrial brakes used on overhead bridge cranes and draw bridges?
Ask an Expert Published: 7/29/2013
Painting Hot-Dipped Galvanized Steel
Do you know of a successful and fool-proof method for cleaning and pretreating hot-dipped galvanized steel before painting?
Ask an Expert Published: 1/9/2013
Corrosion Data on Galvanneal Steel
Do you have any data comparing corrosion performance between galvanneal and pickled hot-rolled steel?
Ask an Expert Published: 6/12/2012
Zinc–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?
Ask an Expert Published: 6/6/2012
Painting a Galvanized Ceiling
A customer wants us to paint the underside of galvanized steel metal decking, which happens to be the interior ceiling of his new structure. The metal has been up for seven months, and he decided he wants it painted white to brighten-up the factory....
Ask an Expert Published: 5/7/2012
Solvent Cleaning Parts
Our company makes packaging machines, and I am the quality control engineer responsible for all finishing operations. We paint castings, sheet metal guards and machined parts. We are presently solvent-cleaning in two dip tanks prior to painting. We ...
Ask an Expert Published: 3/28/2012
Why Use Epoxy Primer?
We have been applying a two-package epoxy primer and then a polyurethane topcoat to our products.
Ask an Expert Published: 2/1/2012
Protecting Brass
I have had customer complaints about the clear coat peeling and corrosion problems on solid-brass numerals for house identification. Can you give any tips on how to polish the brass and protect it for years to come?
Ask an Expert Published: 2/1/2012
Intercoat Adhesion
Q. I am a manufacturing engineer in a plant that produces small appliances. We are having trouble with a baking enamel. 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...
Ask an Expert Published: 12/14/2011

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