Author Topic: How do you restore small rusty bits?  (Read 893 times)

Online BSA_54A10

  • Wise & Enlightened
  • *
  • Join Date: May 2008
  • Posts: 2072
  • Karma: 32
    • BSA National
Re: How do you restore small rusty bits?
« Reply #15 on: 30.03. 2016 08:37 »
I am fairly sure this has been on here before but in case I am going mad.

Rust has 6 water associated with the molecule Fe203.6 (H20).
The laser boils the water and turns it into super heated dry dissasociated steam and in doing so it blasts the rust from the surface.
It was tried 30 years ago for use on rolling & extrusion billets with limited success.
It worked but was not economical when compared to a man with an angle grinder or scabble gun.

The Aluminium industry then ran with it as oxide on the surface of aluminium billets rips up the roll face.
They also trialed plasma guns again with limited success.

Looks like the control units have gotten better & lasers have gotten cheap enough to make it viable.
Bike Beesa

Offline Viking

  • A's Best Friend
  • ***
  • Join Date: May 2015
  • Posts: 128
  • Karma: 2
Re: How do you restore small rusty bits?
« Reply #16 on: 31.03. 2016 09:47 »
Steel bolts:
Clean with a steam cleaner. A good boil up I at tub.

Rust are removed with a bath in hydrochloric acid.

Sand blasting removes surface rust, but the is a residue of rust In pitting’s after sandblasting, and it will start “growing” again.
The hydrochloric acid removes all rust from the items.

After this treatment : Cu plating and Ni plating, with a DIV kit.

Works well.