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Old 07-23-2012, 10:29 AM   #1
Bill Harris OP
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Treating Unpainted Steel

The /5 series uses a horseshoe-shaped fork brace that sometimes twists a bit and needs to have the indexing/mating surfaces trued up. The brace is chrome-plated and once ground, the mating surfaces are raw steel. Although bolted to the fork sliders, this steel surface needs to be protected from rusting. I don't think paint will work because it will flake and peel on contact with the fork slider. I guess that I'm looking at a way to put a phosphoric acid or passivating coating on the steel surface. Any ideas?

TIA...
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Old 07-23-2012, 11:07 AM   #2
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Maybe something from Eastwood? http://www.eastwood.com/rust-solutions/treatment.html
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Old 07-23-2012, 11:55 AM   #3
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Yep, something like that. I'm thinking the displacement zinc-phosphate coating or some sort of "Brush Plating" system from Caswell. They have a variety of chromates and cadmium solutions available. Not only this fork brace, on a old motorcycle I have a lot bolts, fasteners and painted metal bits that are showing their age after 40 years. I don't want a rolling-off-the-showroom full resto, but I'm wanting to ditch the Rat Bike image...

I'll look into it.
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Old 07-23-2012, 12:38 PM   #4
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I simply soak them old nuts, bolts, etc. in full strength "Deck Etching and Cleaner" that I get at Home Depot. I don't know what full strength means, by the way.

After that they all spend a few seconds on the bench grinder on which I have a brass wheel to further polish them. After that, if they are primarily a cosmetic bolt they get painted with clear nail polish/hardner from the cosmetic counter.

To make a dry phosphate coating, mix (by volume) 1 part of deck etching with 3 or 4 parts water, spray and let dry, repeat if you wish. The water will dry faster than the pha will leaving a coating of pha. Depending on what you are spraying, you may see the residue as a white coating which is pha. Gently wipe off any loose powder, and you can then paint or clear coat.
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Old 07-23-2012, 05:20 PM   #5
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You could try Penetrol too.
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Old 07-23-2012, 05:27 PM   #6
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I'd have the hardware professionally zinc plated. My local shop charges a 25 dollar minimum, but they'll plate 25 pounds for that price. So, a buck a pound.

This is all the hardware on the last bike I restored. It was 12 pounds total, so I paid the 25 dollar minimum and dropped off the dirty rusty stuff and picked this up 5 days later.

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Old 07-23-2012, 07:14 PM   #7
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Wow... that is a DEAL...!!

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Old 07-24-2012, 01:16 AM   #8
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Originally Posted by Cat Daddy View Post
I'd have the hardware professionally zinc plated. My local shop charges a 25 dollar minimum, but they'll plate 25 pounds for that price. So, a buck a pound.

This is all the hardware on the last bike I restored. It was 12 pounds total, so I paid the 25 dollar minimum and dropped off the dirty rusty stuff and picked this up 5 days later.
Wow that's good value for money. Will the plating last a long time or will it flake/ discolour?
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Old 07-24-2012, 03:28 AM   #9
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Originally Posted by Padmei View Post
Wow that's good value for money. Will the plating last a long time or will it flake/ discolour?
I've had good results with zinc plating. Generally you have a choice of the silver or a light gold colour. If properly prepared and applied it lasts quite well. Good luck.

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Old 07-24-2012, 07:44 PM   #10
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If it's a small area - chrome nail polish, plastic, flexible and cheap
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Old 07-25-2012, 08:14 AM   #11
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Darn it

I can't remember the name of the stuff, Tractor Supply sells it for cleaning diary equipment. It is a phospate based cleaner that leaves a nice phosphate coating... I will try to think of it.
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Old 07-25-2012, 08:29 AM   #12
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Originally Posted by Cat Daddy View Post
I'd have the hardware professionally zinc plated. My local shop charges a 25 dollar minimum, but they'll plate 25 pounds for that price. So, a buck a pound.

This is all the hardware on the last bike I restored. It was 12 pounds total, so I paid the 25 dollar minimum and dropped off the dirty rusty stuff and picked this up 5 days later.

wow that stuff loooks great,
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Old 07-25-2012, 11:07 AM   #13
Bill Harris OP
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Originally Posted by ericrat View Post
I can't remember the name of the stuff, Tractor Supply sells it for cleaning diary equipment. It is a phospate based cleaner that leaves a nice phosphate coating... I will try to think of it.
TEC, we've got one in town. And "tractor supply" sounds properly Airheadish.

I'm still looking at options on this...
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