norton |
12th October 2015 03:55 PM |
So I've had another go at zinc plating some bolts.
I tried a tumbler to help cleaning them but I failed miserably :(
I need the correct media rather than the aquarium sand I had to hand.
Here's the plating kit.
You have to derust/everything the part to be played. It really does have to be spotless! Then it gets a dip in an alkaline cleaner, then a water rinse, then a dip in hydrochloric acid, water rinse, plating tank, water rinse, another acid dip to activate the zinc plating, water rinse, blues passivate, water rinse, yellow passivate, water rinse theeeeeen you hang it out to dry.
There's an art to knowing the anode to part to be plated ratio. The surface area of each needs to be close to equal I believe. If not, it goes wrong...
Or it can go well!
Like painting it's all about the prep, but more so. You can paint over things but you cant plate over a poor surface. They really do need to be perfectly spotless. Sand blasting to prepare the part would be good. So far I've been using wire wheels in drills, grinders and bench grinders which is fine for basic shapes but I can't imagine I'll have much fun prepping say a fuel rail with these.
I'll take some more pics showing the stages of plating tonight or tomorrow.
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