Piston rod coating
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Piston rod coating

Piston rod coating is a crucial surface treatment technology in hydraulic, pneumatic, and reciprocating motion mechanisms. Its core value lies in depositing a layer of high-performance functional coating onto the base metal to enhance wear resistance, corrosion protection, and friction reduction. Beyond fundamental protection, advanced coatings significantly improve the piston rod's impact resistance, fatigue strength, and the adhesion between the surface hardness layer and the substrate, ensuring reliability and long service life under high-pressure, high-speed reciprocating movement. The choice of coating material is key to determining performance; while traditionally dominated by Hard Chrome Plating, demanding environments increasingly require high-performance solutions like Thermal Spray Hard Metals (e.g., WC-Co/Cr) or Ceramics (e.g., Cr2​O3​), as well as Electroless Nickel-Phosphorus alloys or new composite coatings. These materials offer superior hardness (Vickers hardness often exceeding 800) and excellent chemical corrosion resistance.

Why QUNKE
Jiangsu Newqunke Intelligent Technology Co., Ltd.
Jiangsu Newqunke Intelligent Technology Co., Ltd.

Founded in 2008, Wuxi Qunke Machinery Co., Ltd. is a technology-focused enterprise specializing in the R&D, design, mass production and comprehensive solutions of high-performance hydraulic cylinders, pneumatic cylinders and precision hydraulic piston rods.


Headquartered in Wuxi, Jiangsu – a core manufacturing base in the Yangtze River Delta region – the company now covers a total plant area of more than 25,000 square meters and employs hundreds of skilled professionals. Driven by continuous innovation, Qunke develops hundreds of new products each year to meet diverse industrial demands. Its products are widely applied across numerous key sectors, including water conservancy, metallurgy, construction machinery, marine and port equipment, as well as oil fields, mining, piling machinery and excavators.
To support the long-term growth and global layout, Qunke established Jiangsu New Qunke Intelligent Technology Co., Ltd. in 2022 for foreign market expanding and trading. In 2026, we founded Qunke Europe Co., Ltd. , which serves as its European regional headquarters and operation center. The European subsidiary is responsible for local market development, customer sales and support, after-sales service, technical communication and logistics coordination, enabling Qunke to better respond to European customer needs, shorten delivery cycles, and provide efficient, localized services to partners throughout the region. 

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