Technical & Reference Section > Tech and Restoration

Adventures in Anodising

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Avro:
...the current rarely goes above 1.64 amps

Avro:
This is a cathartic post. I was never happy with the 44T Sugino chainwheel. I wished I had prepared the surface myself rather than assuming that the polished surface as received was good enough. When I stripped the anodising from the teeth I had a few mishaps which required touching in etc etc. Needless to say it bothered me.

I decided to do it again. However it was not that straight forward. I ended up doing it nine times again! The anodising and/or dying phases kept failing. I tried this and that but still pants. Deep breath and remembering that winners never quit and quitters never win, I perservered. For some unknown reason attempt number nine was super, possibly my best result ever.

I had tried liquid mask on the teeth but it too failed a couple of times so I decided to anodise the whole thing and mask later to remove the excess. Result. Cathartic as I said.
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Avro:
MX900's from raw to blue.
I had to redo one caliper as the process completely failed but other than that they turned out lush.
I have changed the way I mount parts for the anodising tank. I now effectively make frames from nuts and bolts. The change has proved very effective.

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Avro:
I bought this MX900 at MK17 for the princely sum of £25, bargain.
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First it is stripped down and cleaned with a tooth brush and detergent, I don't want to pollute my deep cleaning solutions with oil and grime. This is what they caliper arms look like after stripping in caustic soda and then scrubbed in a nitric acid solution, this is as raw as you can get the aluminium.
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The calipers are then hand polished with pastes, starting with Autosol and finishing with Peek. I then polish with a dremmel and my little bench grinder which is dedicated to polishing. I went straight to the finishing compound. I decided to try a red this time, the colour is called 'Fiery Red'. They are not perfect, I actually forgot a final dipping stage but the results are still pretty nice. I really get the feeling that I am getting somewhere with anodising now. The blue calipers I did before have really encouraged me.
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griff:
They look great!  :daumenhoch:

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