A well designed and proactively managed aqueous washer system provides premium performance.
Q. Our goal is to have our gas regulators pass ASTM B117 for 500 hours. We use an epoxy powder coat; parts are treated with zinc phosphate first, then powder coated. We are seeing the internal parts of the castings rusting prematurely. Which spec could I call out to increase corrosion protection, MIL-DTL-16232G Type Z, class? Or TT-C-490, Type I?
Q. I want to remove zinc phosphate from hardware parts after cold heading. Typically to remove zinc phosphate, I would soak in chromic acid at a high temperature, but this is not a viable or safe method for bulk treatment. Can I just hit the parts with a higher concentration of potassium hydroxide at a higher temperature to remove the zinc phosphate?
Q. I inherited a cleaning and phosphate line and over the last two weeks, we have lost our phosphate solution twice. I am told it is because we have lost iron in the solution. Is there an additive that can be used to help maintain the solution as the tank is not in constant use?
The two firms will be offering two days of training, with several technical sessions and hands-on testing throughout the day. The training is free, but space is limited.