finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
(current
topics)
topic 3652

Alternatives to chrome plating for cylinder rods


(1999)

We are looking for alternatives to chrome plating for cylinder rods. Are there some cost competitive options that have superior corrosion resistance?

Lloyd Blumenstock
Fargo, North Dakota


(1999)

Corrosion resistance isn't usually the real issue, Lloyd, oil holding capacity is. Electroless nickel is far superior to chrome in corrosion resistance, and has replaced it in some instances, but many cylinder applications of it were unsuccessful, only partially successful (requiring electroless nickel with a flash of chrome) or required a good deal of development work. Fortunately, you're not early into this and a diligent literature search will reveal published case histories. Good luck,

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


(1999)

How thick is the chromium coating? If it's fairly thin (under 0.0005"), a PVD coating might be able to replace the chrome. If it's particularly thick, you might try either thermal/plasma spray or electro-spark deposition.

jim treglio portrait
Jim Treglio
- Vista, California


(1999)

You will be hard pressed to find any other process, regardless of cost, that would outperform standard hard chrome plated bar stock used for hydraulic rod applications. You do not mention why you are looking for hard chrome replacement. We assume that it is not a quality issue.

If you have a well funded research budget many different coatings are now available. I would suggest starting with PVD coating TiN. The hot (700 F) process is better than the cold (400 F)!

Regards.

Stephen C. Ward
- Canada


(2000)

Lloyd:

Chrome plating is under some threat, as you may know, by environmentalists and hardened nickel is under some discussion as an alternative. We have done some research into replacing steel coated with chrome, by solid nickel with an outer layer of hardened nickel. Under consideration in parts of the aerospace and defence industries in US and Canada.

If the nickel pieces (cylinders or other parts) are formed by chemical vapour deposition (CVD), there is no layering, or risk of delamination, because the outer layer of hardened nickel is completely bonded to the backing layer, in one continuous deposition process.

mick omeara
Mick O'Meara
- Toronto, Canada


February 21, 2009

Hi, Lloyd. Many small cylinder rods like the air lifts for auto tailgates are salt bath nitrided. See the article in our library by Kolene.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.