DIY zinc plating

How feasible would it be to do my own zinc plating? I'm fed up carting around 40 odd mild steel plates 1000x80x6mm and then waiting 3 days only to then have to pay £2 per length. Bob

Reply to
Emimec
Loading thread data ...

There's three methods:

Galvanizing (electrolytic plating) Hot plating (dipping in molten zinc) Cold plating (basically a zinc loaded paint)

The first is okay, but slow - you basically clean the plate [1], connect a DC electric supply (positive I think) to your lump of metal, then connect the other terminal to a piece of zinc. Drop in a solution of electrolyte (dunno what you'd need to use - some are dangerous or expensive, or both)

The second involves heating up a large tank of zinc to melting point, then placing your clean[1] lump of metal in until it reaches a stable temperature and the zinc sticks - kind of like tinning a soldering iron bit - probably not a good idea at home.

The third is easiest, reasonably effective, but not as durable :

£10.40 for a 400ml aerosol - supposedly does 3.2m^2, so should do about 15-18 of your bars.

The bars will still have to be clean [1], although just degreased may be ok if there is no flakey rust/paint

[1] clean as in soak in a bath of acid, then neutralise in an alkali, then rinse in clean water
Reply to
bigegg

For starters, IIRC, you need an acid tank for pickling, a rinse tank, plating tank with a zinc anodes and a plating solution, (various solutions exist for this, zinc cyanide was the cheapest, not that PC I suppose in the EU, together with brighteners to make the items pretty, optional) with a variable DC power supply, a rinse tank then a pacifying tank, and then another rinse tank. The rinse tanks need a constant supply of water to prevent chemical buildup. Simple really. E & OE :-)

BTW acid pickling tanks are not the thing to have around machine shops.

It's not rocket science, but considering the cost & room requirements, wouldn't you be better off sticking to machining?

Tom

Reply to
Tom

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.