Problem? Solution? Chime right in!
(perhaps the world's last 'no registration' site)
"Surface finish, pre-plating and post-plating operations for hydraulic cylinder rods"
What pre-plating, plating and post-plating techniques are required to get a proper surface finish of a hard chrome plated rod for the best sealing properties. This is a zero pressure application. I need to keep oil inside of a housing with a recipricating rod extention. I am using hard chrome for corrosion resistance.John Keesee
- Radford, Virginia
For hydraulic cylinders which operate frequently and at high pressure, a typical process might be grind to 16 ra or better, hard chrome several thousandths thick, then grind or polish to 16 ra or better. Some polish to a mirror finish, but I'm not sure this is either necessary or desirable. If your need is for low pressure and low cycle frequency, you may be able to use relatively thin chrome (<.0005") and eliminate the second grind/polish step. Typical seals for cylinders are designed to work pressurized, so talk to a seal mfr and be sure you get seals appropriate for your application.
Jeffrey Holmes, CEF
Spartanburg, South Carolina