best finishing
best finishing
(OP)
Can anyone suggest the best plain finishing (meaning no coating/plating or whatsoever) which will demonstrate a rather good resistance to rust (at least no obvious and almost immediate effect caused by the moisture of human finger)
the part is made of free cutting steel.
Thanks a lot.
the part is made of free cutting steel.
Thanks a lot.
Best regards,
ct





RE: best finishing
RE: best finishing
About the only why to slow down rust of steel is force an oxide, furnace bluing. Just don’t have a finger print on the metal when you start to blue it.
Any coating oil has to a made for rust prevention.
Could you comeback with the reason for this requirement?
RE: best finishing
I know companies that purchase the steel intentionally extra-thick and allow it to rust. Iron Oxide is a pretty good rust inhibitor, if I recall my metallurgy correctly (been a few years...unclesyd is a MUCH more reliable source). When the time comes to use the steel for fabrication, they sand blast the surface. Not elegant, but it has worked for decades.
RE: best finishing
RE: best finishing
I know of many fencing structures "left to rust," so to speak, - and they take care of themselves with the help of the coat of rust formed in the initial days.
Of course, this may not be a permissible option in industry.
As for limct's requirement, a film of oil as suggested by handleman seems the best option, assuming what limct means by "finish" is surface treatment.
RE: best finishing
Tom
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
RE: best finishing
I've found that cleaning my hard steel fixtures with simple green and then water/windex and finally a light oil like WD-40 or TKX (CRC) works wonders. (pack in VCI for storage and the VCI paper takes up the excess oil wonderfully)
Nick
I love materials science!
RE: best finishing
Cosmoline - my CMP Springfield from 1944 looked like it came out of the bluing bath yesterday - comes off with elbow grease or easy with boiling water
If you have to keep it clean: Zerust capsules
http://www.ntic.com/capsules.htm
Vci:
http://www.cortecvci.com/Products/products.php
if you go to stainless, be sure to passivate it [ASTM A-967]
lotsa good info: http:
RE: best finishing
This does a few things for you. First and esthetically speaking, the piece will rust a lot less if any after nitration. Second, the increase to surface hardness will offer some wear resistance.
Good luck with it.
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada
RE: best finishing
There does exist one strong alloy that develops a self- limiting oxide and is very free cutting; 2024 aluminum.
Mike Halloran
Pembroke Pines, FL, USA
RE: best finishing
Someone sells an anti-corrosion liquid spray, but the performance is less than a year as I remember it.
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