I have a problem with some parts I did a while back, and I have a few questions. If anyone can help I'd appreciate it big time.
A year or so ago I powder coated a couple of magnesium airplane control yokes. I prepped them by blasting with aluminum oxide and washing down with acetone. I recently got them back because they had a problem; the powder coating is deteriorating in spots that seem to have corrosion pitting underneath. They are mostly in the areas where the pilot holds the yoke, but are also in a few other areas.
I'm not too familiar with the chemistry here. If there is corrosion pitting in the magnesium, should I treat it with something, besides just blasting with Aluminum Oxide?
Is there a special powder I should use instead of plain polyester? I used a black glossy polyester powder before.
I have a can of zinc primer powder. Where is this usually used, and is it of any benefit on magnesium?
Thanks in advance for any advice anyone has. I'm already aware of the fire hazards of magnesium, I'll be careful
Steve