Surface treatment

To achieve acceptable protection against corrosion and wear, the wear parts of the hydraulic cylinder need surface treatment. Typically, a hydraulic cylinder has a chromed piston rod and other painted parts. However, different applications have different requirements.

Painting that withstands

We perform painting in our modern wet painting facility. Recent investments in equipment such as electrostatic technology allow us to minimize paint wastage, benefiting both the environment and cost savings. For cylinders in normally demanding environments, we use an etching primer, while even more extreme requirements in certain environments lead us to paint according to higher paint standards, which also include sandblasting.

The piston rod, a vital component

Even chrome-plated piston rods can corrode under certain conditions or with very infrequent use. A piston rod without a smooth surface quickly results in leakage as the seals wear out.

The solution may be a different surface coating on the piston rod.

• For a cylinder located in an environment exposed to external influences, such as near saltwater in a harbor setting, entirely different corrosion protection requirements are imposed; in some cases, a stainless steel piston rod is recommended.
• In other cases, the placement may be in truck bodies where both gravel spray and road salt create very harsh conditions.
• Construction machinery with a high risk of heavy impacts may require hardened surfaces to ensure the piston rods’ durability.

The right solution in the right environment

Tell us about the environment in which your next cylinder will operate, and we will assist you in choosing the right material and surface treatment.

X = Standard
O = By request

Hard Chromium Plating – Standard

Hard chromium plating enhances the wear resistance of the component and improves its friction properties. Hardness 900-1100 Vickers. Hard chrome can be applied to most metals.

Chemical Nickel Plating – Upon Request

Chemical nickel plating is a nickel/phosphorus coating where varying the phosphorus content can yield different properties. The primary advantage of chemical nickel plating is that, unlike electrolytic coatings, the layer is evenly distributed even on complex details. High phosphorus: P = 11-13% for excellent corrosion protection. Used in highly corrosive environments.

Corr-I-Dur P® Bodycote

Corr-I-Dur P® combines hardening with corrosion protection. With this revolutionary method, Corr-I-Dur P® saves valuable time in the post-processing of your products compared to other hardening processes.

In applications such as hydraulics, Corr-I-Dur P® is often found due to the high demands for wear resistance, strength, and corrosion resistance. In short, wherever components require extremely high precision and mobility, Corr-I-Dur P® is a compelling alternative to traditionally chromed components and details.

Environmental Friendliness All the Way – Black is Green

Corr-I-Dur P® black surface coating should actually be green because Bodycote fully meets the environmental requirements.