Anti-corrsion "hard chrome" alternative

[MarkRPflow]

Outdoor equipment with carbon steel rods
1.5 x 0.5 wall x 4 @ 8' 4 @ 16' 4 @ 26' long
supports 8' x 12' display platform.
Rods occassionally raise up & down thru UHMW guides.

Rod supported by welded collar at top of rod and passing thru steel support. Bottom of rod is threaded and has a rod eye pinned to the platform.

Looking for anti-corrosion alternative to "hard chrome" (i.e epoxy with sealer/hardener).

 

[MikeHalloran]

Polyurethane paint and silicone grease?

Stainless steel tubing or hollow rounds?

Thin stainless wrapped around the CS? (Lockseam or adhesive bond)

Oil well sucker rods? ( I don't know if they're available in the length you need, but I think there is a selection of materials)

How many will you need? How long do they need to survive?





Mike Halloran
Pembroke Pines, FL, USA

 

[TVP]

Ferritic nitrocarburizing?

http://www.nitromet.com/A55B6F/nitr.../$FILE/Nitromet gas spring case study 404.pdf

 

[MarkRPflow]

Thnaks - Great - quick feedback -

Currently unit is a prototype. Life before maintenance - 5 years.

12 rods per unit - 4 @ 8', 4 @ 16', 4 @ 26' long.

 

[Compositepro]

A polymer coating will probably not last long enough. There are many metal platings that can be used, including electroless nickel.

 

[ponchoak]

HVOF coatings are great for shafts in that type of or similar situations. I believe ABF in OH is a good place to start.