plating, anodizing, & finishing Q&As since 1989
Application requirement of Nickel vs Nickel-Chromium plating
May 10, 2010
We are developing hydraulic pistons which require properties of corrosion and wear resistance. We decided to plate with either Ni plating or Ni-Cr plating. Ni-Cr plating is costlier. Is it good to go with Ni plating? Which characteristics influence of selecting above mentioned platings?
Product designer - Chennai, Tamilnadu, India
May 10, 2010
Hi, Siva. Electrolytic nickel plating will not be satisfactory. You must do the nickel-chrome plating because the chrome adds corrosion resistance (symbiotically in concert with the nickel plating) and a low coefficient of friction. But decorative nickel-chrome plating is not generally used for this application because of the thinness of the chrome. Usually a heavy chrome plating, hard chrome, would be used for wear resistance and oil retention.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
May 12, 2010
better you try with Zinc Flake coatings.
- Salem, Tamil Nadu, India
May 13, 2010
Zinc flake doesn't have any wear properties, great corrosion resistance but I would think the hydraulic seal would scrape it right off.
electroplater - Galva, Illinois
June 5, 2010
Dear Siva, you should opt for electroless nickel platingHarish Gurnani
October 1, 2010
You have not mention where these pistons rods are used. For Earth moving Hydraulic Cylinders Piston rods 25-40 microns of Hard Chrome plating is generally applied as they withstand varied climatic conditions. However in Marine conditions I would prefer 20 microns of duplex Nickel and 10 microns of Chrome
electroplaters - Belgaum, Karnataka, India