foundry fresh alum - Plating Powder Coating Buffing Anodizing

Blademan · #1 (**permalink**) 04-23-2004, 01:58 PM

Has anyone messed with alum that has just been poured, or say a couple weeks old? this stuff is a special blend (?) they told me and its pretttttty dam hard for alum. the problem im having is outgassing no matter what I do, ( read the tips on outgassing) there almost the size of a pin head,and scattered and never in the same damn place no matter how many times I strip it and start over...

Thanks

#2 (**permalink**) 04-23-2004, 03:03 PM

blade you will not get the gas out of it .. i pour alum.. and i it is melted down lawnmowers and carbs... and what not .. i get the little pin hole in the casting to ... no matter what i do they come back... it may be the flux i use to ... but each part is washed 5 times before it go's in the melting pot and i skim the crude off till i get a clean pot .... i will do some looking in to it and keep you posted

Blademan · #3 (**permalink**) 04-23-2004, 05:25 PM

so its gonna just be hard to powder coat .Would I just light blast the thing again and re-powder?
havent had this problem with other alum stuff I've done.....
thanks

#4 (**permalink**) 04-23-2004, 06:22 PM

i tryed to do a door handle ... it was bad ... i just spray the with self etching primer the top coat them .... the stuff i put in the lathe may be good for anodizing .... but there may be a cure ... pryo putty make work ... i will give it a shot ....

Noob2PC · #5 (**permalink**) 04-23-2004, 07:34 PM

I'm having a tough time with MR Gasket Carb adapters. I had to do a 2nd coat on one and it outgassed bad, I mean hell, they were not there the 1st coat. The other one I even preheated and it still outgassed on me. Oh well, live and learn, off to ebay those 2 go

#6 (**permalink**) 04-23-2004, 09:07 PM

ebay that is where all my mess up go't to ..... alot of that sand casting stuff is ok to just spray paint ....

DALE · #7 (**permalink**) 04-23-2004, 10:14 PM

For cast aluminum I try to get customers to go with a textured powder, it hides most everything. Also try outgassing your part for a rediculous amount of time, you can't go to long. Most people stop around 30 min or less.

Blademan · #8 (**permalink**) 04-24-2004, 04:55 AM

heres a pic of the handles in a low sheen black..

these handles are made from marine grade alum cast at the companys shop...

#9 (**permalink**) 04-24-2004, 08:05 PM

they look good ....

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