Jump to content

Recommended Posts

Hi Richard,

anodising can only be done to aluminium or its alloys.

It puts a hard layer on the surface that stops/slows corrosion (although the corrosion is a protective coating in itself).

 

It can also be coloured and bright (similar to chrome).

 

Well worth doing if a paint scheme can't be done.

 

Roger

Link to post
Share on other sites

Roger, although ferrous metals aren't anodised, they can be passivated by various techniques, yes? This is done on some stainless steel grades in particular, ISTR. Maybe passivation is what you're thinking of, Richard?

Link to post
Share on other sites

Years back this was done with Cadmuim. Now banned in EU.

Stiil used in the Far-East though.

 

I made some stuff that got tested in a salt-spray chamber.

The "stainless" fittings corroded but the Far-East Cadmuim passivated were fine.

 

Anodising isn't hard to do. Frost's have a DIY kit.

This should work fine for smallish parts.

Edited by AlanT
Link to post
Share on other sites

Looks like gold-passivated bright zinc to me. I think the 'gold' colour was introduced to make it look more like cadmium, which is more corrosion-resistant but poisonous, environmentally harmful, mutagenic, etc., etc.

I don't know how it's done either, but when I used to work as a test equipment engineer, we had a plating shop next door. Wish I still worked there when I was restoring the 4A.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...

Important Information

Please familiarise yourself with our Terms and Conditions. By using this site, you agree to the following: Terms of Use.