Parkerising anyone?

Question

Anyone tried Parkerizing steel parts? I've a few mechanical bits I've re-made on my 60 ton press, and rather than leave tthem plain 'as turned' steel I'd like to :Parkerise them.

I know that basically it's phosphoric acid with either manganese dioxide or zinc dioxide (?), heated and 'primed' by immersing clean steel wool, then immerse the object and keep just below boiling for 5 mins or so, then rinse and oil.

I have a gallon of phosphoric acid, dry cells have manganese dioxide as the depolariser so in theory I should be set to go, but has anyone on the panel done it and got any tips?

AWEM

Mark Rand · Accepted Answer

I've had all of the ingredients for some years, but still haven't got round to trying it out:-(

Remember that Leclanché cells have the MnO2 on the inside and alkaline cells have it on the outside :-)

Mark Rand RTFM

bugbear · Answer

^^^^^^Are you *sure* this is **model** engineering?   BugBear (amazed)

Tony Jeffree · Answer

Coming from Andrew, the 60 tons is almost certainly the *weight* ofthe press...Regards,Tony

Andrew Mawson · Answer

Well OK Tony I like big toys! Actually, having replaced the hydraulic pump (as the original was fire damaged), the theoretical force is now up to 79 tons as the pressure is now genuinely up to 9,500 psi !!!!

Now back to Parkerizing.......... !

AWEM

Bob Minchin · Answer

It all a question of scale BB!Bob

John S · Answer

79 tons ? I would have thought if you were upgrading you would havemanaged a decent force...................John S.

Andrew Mawson · Answer

hydraulic79 tons ? I would have thought if you were upgrading you would havemanaged a decent force...................John S.Well I don't propose to put my finger under it even at that wimpyforce  Mind you boredom would stop you if nothing else, as the ramdescent speed is snail like due to the low volumedelivered.AWEM

82045 · Answer

Some folks prefer to work at 304.8mm =3D 1ft

Tony Jeffree · Answer

That's probably working on too small a scale for Andrew... ;-)Regards,Tony

Parkerising anyone?

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