Thread: Pakerizing metal finish

Gday Grahame, bought a pair of dividers that look exactly like yours at a recent tool sale. Heavy & solid, they're great.

That Parkerising process looks interesting.


Cheers...................Sean

Originally Posted by Grahame Collins

Having promised to do a photo set on the surface treatment, i finally had time to do it.

. . . .

The chisel turned out much better than the dividers cos some dickhead forgot to clean them up with thinners before they went into the pot.

Very nice Grahame. What's the process - did you post that somewhere else?

That dickhead you mentioned visits my place occasionally as well and he's been more regular of late.

G day BobL

I had made a mention of the process back a while in a thread about blueing.

http://www.woodworkforums.ubeaut.com...040#post428040


There are more links to overseas sites that deal in the phospating ( parkerising ) of Milatary firearms + accessories.
Hope it helps
Grahame

Not trying to steal your thunder or hijack your thread grahame, but if anyone wants to know how to do other types of metal treatments, yell out. We do electroplating at work and have a full time electroplater employed for tin plating, nickel plating, parkerising, anodising, cadmium plating ect of all metals and there done to aircraft standards, I do my own electroplating of parts at work. So if I cant answer it for you I can ask Paul at work
Steve

As mentioned in another thread, Phosphoric Acid is now hard to get.

Where do you get yours?

I use Wattyl Metal-Prep but it seems that it is no longer available, I may be worng but I can't find it stocked anywhere any longer.

hey fellas
Don't stress!

Most car shops carry rust killing preparations that have it as the major ingredient.
I grab whatever is available that I can read from the label ( and that getting harder every day) that carries the highest percentage of Phosphoric acid.
I have loaded a couple of pics of the type of stuff.

I have not stuck to the formula quantities too well either.You know how it is,a splash of phos (yep!, it looks about right) and a handful of steel wool.

A bit of caution with the maganese dioxide. I make sure the dust will blow away from me.Its a suspected carcinogenic, not a bloody radioactive lump of uranium.

I got my MD from the pottery shop, but if things are tight bust up a few flat torch batteries, the black stuff is, you guessed it, manganese dioxide.

Make sure that you clean up with acetone or thinners before it goes in the pot or you may get the scungy look like my dividers.Even skin oils and fats can affect the finish, apparently.

cheers

Grahame