Chrome‑plating This is a widely‑used surface‑treatment process for piston rods. Depositing a chromium layer onto the piston‑rod surface substantially improves wear resistance and corrosion resistance, while also enhancing surface finish.

Thermal‑spraying of Wear‑resistant Materials This is another common surface‑treatment technique for piston rods. Spraying a layer of wear‑resistant material onto the rod surface boosts wear and corrosion resistance. Different colours and surface appearances can be selected according to requirements.

Electro‑galvanizing This is a relatively cost‑effective piston‑rod surface‑treatment method. Electroplating a zinc coating on the piston‑rod surface improves corrosion resistance as well as cosmetic appearance.

Anti‑corrosive Coating Spraying This effectively protects piston‑rod surfaces against corrosion and oxidation. Common anti‑corrosive coatings include rust‑resistant paint and aluminium‑powder paint. Spraying anti‑corrosive coatings can greatly extend service life.

Carburizing and Quenching This surface‑treatment process hardens and enriches carbon content at the piston‑rod surface. Carburizing‑and‑quenching treatment delivers markedly higher hardness and wear resistance, while retaining good impact‑resistance performance.