Removing white alloy corrosion (car related)

[Nope.]

Hi All,

So I recently acquired a 1.7 16v Alfa Boxer from a 145 as an upgrade for one of my Minari's.

The airbox (And other alloy parts) are all covered in this horrible white aluminium corrosion:

https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-ash3/1517571_10203096783919798_1562370532_n.jpg

https://scontent-a-lhr.xx.fbcdn.net/hphotos-ash3/1524755_10203096783959799_1926338192_n.jpg

https://scontent-a-lhr.xx.fbcdn.net/hphotos-prn1/1555538_10203096784039801_1702280319_n.jpg

I've tried vinegar and a tooth brush to little avail. It removes the top coat of white powdery stuff but not the ingrained corrosion, I used a test patch on the back to try my dremel with it's sanding cylinder on, it did remove the powder but I had to go quite far to falt the metal down and this won't work on the written detail on top.

Will soda blasting it work? Can I soda blast with my shot blasting gun?

Thanks all!
____________________
Former: Derbi GP1 50, Sachs XTC 125, Suzuki GSXR 400 GK73A, Kawasaki ZX7R, Suzuki DR250, Yamaha RD350
Current: 2011 Yamaha XT660Z Ténéré, 2003 Yamaha YZR-R1 5PW (In Build), 2009 Kawasaki ZZR1400

[Copycat73]

one of these

https://i867.photobucket.com/albums/ab232/copycat73/cottonwheel.jpg

some buffing soap

https://i867.photobucket.com/albums/ab232/copycat73/buffinsoap.jpg

then this stuff

https://i867.photobucket.com/albums/ab232/copycat73/allsorts/solvol.jpg

its hard work though & takes a lot of time..
the finish will be as a mirror
____________________
Whatever I post I have no citation and no intention of providing one..
caveat emptor

[Kickstart]

Hi

Vapour blasting will probably sort it out cleanly (although make sure no debris is still in the manifold afterwards).

What ignition system are you using with this engine? Have you got any cams from a non cat 33 to go on it?

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Nope.]

[Shaft]

You could spend a month of Sundays scrubbing it with a toothbrush, but if you want to paint it and you expect the paint to stick, get it blasted.
____________________
Things get better with age; I'm close to being magnificent........
20 RE Interceptor, 83 Z1100A3, 83 GS650 Katana
WooHoo, I'm a Man Point Millionaire! https://www.bikechatforums.com/viewtopic.php?t=234035

[Suntan Sid]

I managed to get rid of the same corrosion using diesel and a scotchbrite kitchen scourer, for the initial clean, then used the scourer with WD40 for the final clean.
All done by hand, didn't take too long and it's as cheap as chips.
If there's any pitting you're not going to get rid of it, with this method. However, as you don't want a polished finish it should work!
____________________
"Everybody needs money, that's why they call it money!"

[Vincent]

Wire brush....and where you can get in, a wire drill brush. May be an idea to wear a mask though.

For smaller jobs like your manifold, I use these, be careful....the heads are a bit feeble. The SS ones are great for this sort of job.

www.ebay.co.uk/itm/6Pc-175mm-WIRE-BRUSH-SET-NEW-Brass-Nylon-SS-RR24-Hobby-Crafts-Garage-Plugs-/141131150843?pt=UK_Hand_Tools_Equipment&hash=item20dc1275fb
____________________
Space Is Deep

[Walloper]

To remove white alloy corrosion you can use ebay.

Some daft fcuker will buy it off you.


____________________
W-ireless A-rtificial L-ifeform L-imited to O-bservation P-eacekeeping and E-fficient R-epair

[Copycat73]

[ZRX61]

Soda blasting would have those parts looking like new in mere moments. Don't bother fucking about with buffing wheels, grinders, wire wheel's etc.

As they are Alfa parts they will actually end up looking better than the day they left the factory.
____________________
They're not one night stands, they're auditions.

[Robby]

Soda blast. I would then be tempted to leave them unpainted and give them a rub with ACF-50. Soda blasted alloy looks good and will take a while to start corroding again with a bit of anti-corrosion coating.

If you're tight and have a compressor, you can make a soda blasting rig for next to nothing and do it at home. Wear a good mask, and just hose down the working area/garden afterwards to get rid of the white powder.

[Vincent]

[Walloper]

[ZRX61]

[Walloper]