Large hydraulic shafts are chrome plated so that a seal ring can slide easily over this surface during operation

Large hydraulic shafts (fork lifts, back hoes, dump trucks, etc.) are chrome plated so that a seal ring can slide easily over this surface during operation. Over time chrome will wear or corrode and this leads to breakdown of the packing seal. The result – loss of hydraulic pressure, contaminated fluids and the need to re-chrome or replace the shaft. Tungsten carbide coating will replace chrome in this application and last many times longer. The surface finish for polished tungsten carbide is 2-4 Ra with an Rz of 12-15. This smooth surface ensures packing seals will also last a long time. The higher corrosion resistance carbide coating is perfect for areas prone to corrosion pitting – ocean work zones, chemical plants, etc.