New Coating Extends Cylinder Life Up to Eight Times Longer

New coating Extends Cylinder Actuator Life up to Eight Times Longer - Hydro Dam image. Parker Hannifin Industrial Cylinder Division Hydroelectric turbine systems operate in extremely harsh conditions. The corrosive conditions in challenging industrial and outdoor environments, especially in hydro market applications, greatly shorten the life of operational parts, such as cylinders and actuators. 

Advanced cylinder coating resists corrosion

Parker Hannifin Corporation has developed an advanced cylinder-rod coating called Global ShieldTM that resists corrosion up to eight times longer than conventional coatings. Global Shield outperforms standard coatings like hard chrome, nitride, electroless nickel and hard chrome over electroless nickel when tested against the corrosive properties of salt spray, calcium chloride spray and magnesium chloride spray.

Global Shield technology

Global Shield was developed in direct response to customer demands for an environmentally-responsible, corrosion-resistant coating that significantly reduces downtime associated with cylinder repairs and seal replacements. The Global Shield coating has a sub-micron structure that eliminates surface micro-cracks and delamination, especially when flexure occurs.

Extensive lab and field testing have validated the coating’s performance against corrosion and dynamic wear. Cylinders protected with Global Shield have demonstrated resistance to corrosion up to eight times longer than conventional coatings. Tests also confirm leak-free performance even after 1 million cycles and 2,000 hours of salt spray. When compared to hard chrome and tested using the Rockwell “C” Indentation Test, protocol, Global Shield exhibited exceptional interfacial adhesion and impact resistance, with almost no micro-cracking, chipping, spalling or delamination.

New coating extends Cylinder life up to eight times longer - Global Shield Coating image - Parker Hannifin Industrial Cylinder Division Compared to traditional rod coatings, Global Shield provides the following advantages:

  • Significantly improves corrosion resistance—a result of the single-layer, fully-dense, submicron structure and the lack of micro-cracks
  • Lower friction
  • Ductile and tough—when the rod bends, so does the coating
  • Engineered hardness (HRC 54 minimum) for wear-resistance

As a result, fewer cylinder repairs and seal replacements (and therefore less downtime) provide a longer life in corrosive environments. This results in lower service costs, because the piston rod does not have to be replaced as a result of corrosion.

Another benefit of Global Shield is that it’s good for the environment. No chromium is required in the coating or the manufacturing process, which eliminates hexavalence, hazardous waste stream risks and PEL (personal exposure limits) concerns and complies with RoHS Directive 2011/65/EU regarding recyclable coating materials.

Global Shield can be easily applied during original Parker cylinder manufacture or installed during aftermarket cylinder maintenance via a process that is both efficient and environmentally responsible. Global Shield is an available option for nearly all Parker cylinder sizes.

Applications abound

The ability of Global Shield rod coating technology to resist corrosion from salt spray, calcium chloride spray, magnesium chloride spray and other environmental conditions makes it ideal for challenging industrial applications. It is well-suited for hydro-oriented applications such as hydroelectric and marine/intermodal operations. Other industrial applications include mining, construction, material handling, renewable energy and power generation, refuse, oil and gas, military, heavy-duty trucking, forestry and other challenging industrial and mobile environments.

New Coating Extends Cylinder life up to eight times longer - corrosion performance testing chart - Parker Hannifin Industrial Cylinder Division

Compared to chrome, chrome over nickel or other multi-layer/multi-process rod-plating technologies, Global Shield will improve cylinder performance with better initial and long-term ownership costs. It may also be an economic alternative to corrosion resistant steels when applied to carbon steel.

New Coating Extends Cylinder life up to eight times longer - cross section view of cylinder with global shield coating - Parker Hannifin Industrial Cylinder Division



Are you attending Solar Power International?

Please join our Energy Platform Solutions team at Solar Power International show, September 10-13 at Mandalay Bay Convention Center in Las Vegas, NV. Visit our engineers at booth 1545 and see end-to-end solutions for solar, grid-tie and energy storage applications. Get a sneak peek of our featured products on demo by visiting our energy platform solutions page


Article contributed by Rade Knezevic, Business Development Manager, Parker Hannifin Industrial Cylinder Division





Additional resources on this topic:

Smart Hydraulic Cylinder Optimizes Hydroelectric Dam Gate Control

Global Shield is the Greener Path to Corrosion Protection

Smart Cylinders Reduce Operational Costs

Hydraulic Power Units Control All Functions of Hydro-electric Turbine

Innovative New Fluid Purifier Saves Time, Money in Hydroelectric Plants


Recent Posts by Author

5 Technology Trends Behind the Top Hydraulics Blogs of 2017

2017 brought about innovative new technologies that laid the foundation for the latest hydraulic systems and applications designed for construction, agriculture, mining, power generation and related...

Meeting Your Work Truck's Demand for More Hydraulics Space

Dump pumps have long been the standard in the dump truck and trailer segment. The cost-effectiveness of a combination pump and valve with a built-in relief has been a winning combination in the North...

Hydraulic Fan Drives: Efficiency Driven

Looking to improve the efficiency of your construction equipment? Consider a hydraulic fan drive. Compared to mechanically driven fans, hydraulic fan drives provide several advantages. This is proven...

Comments for New Coating Extends Cylinder Life Up to Eight Times Longer

Please note that, in an effort to combat spam, comments with hyperlinks will not be published.

Leave a comment