Surface Treatment of Materials for Rotary Joints

Enhances the passive film on the metal surface through chemical or electrochemical methods, significantly improving corrosion resistance. It is especially suitable for stainless steel.

Uses high-speed sand particles to impact the workpiece surface. This not only removes impurities such as burrs and oxide scales but also forms a micro-rough surface, laying a foundation for subsequent protective processes.

Forms a black protective film on the metal surface through oxidation, high-temperature oxidation, or similar methods, enhancing wear resistance and providing short-term rust prevention.

Forms a chromium layer on the metal surface via electrochemical deposition. With high hardness and excellent wear resistance, it is suitable for rotary joints operating under high-load conditions.

A dense zinc layer is formed on the surface of metal substrates (e.g., carbon steel, cast iron) via electrochemical deposition or thermal diffusion. It delivers corrosion protection to the substrate by leveraging zinc's sacrificial anode mechanism (zinc corrodes preferentially) and physical barrier effect.

Removes micron-level protrusions from the material surface, improving surface flatness and smoothness. This reduces the friction coefficient and extends the mechanical life of the product.

Atomizes the coating into tiny particles that uniformly adhere to the workpiece surface. After drying/curing, a continuous and dense protective film is formed, providing both protective and decorative functions.

Generates an oxide film on the surface of aluminum and aluminum alloys through electrolysis, greatly improving the material's wear resistance, corrosion resistance, and insulation.

A composite process that integrates heat treatment and corrosion prevention technology. It can simultaneously improve the surface hardness, wear resistance, and corrosion resistance of metals, adapting them to harsh working conditions.