Technology / product information

In industrial machinery and equipment, surface oxidation and corrosion are key causes of deterioration that reduce both durability and visual quality. Steam Oxide Film Treatment is an environmentally friendly surface modification process developed to solve these issues. By oxidizing steel surfaces in a hydrogen-steam atmosphere, this process forms a dense, stable Fe₃O₄ (Magnetite) oxide film, improving anti-rust, corrosion resistance, and appearance simultaneously.

Process Principle
The Steam Oxide Film Treatment process involves heating steel components to 400–450°C in a hydrogen-steam atmosphere (H₂ + H₂O) to promote controlled oxidation. During this process, a chemically stable Fe₃O₄ (Magnetite) layer forms on the metal surface. This Fe₃O₄ layer tightly adheres to the steel substrate and effectively prevents oxidation caused by air or moisture — stopping the formation of red rust (Fe₂O₃).
Additionally, it gives the metal a dark gray to black matte finish, offering both anti-reflective and decorative properties.

Properties After Treatment
Formation of a dense Fe₃O₄ oxide film, improving anti-rust and corrosion resistance.
Excellent resistance to humidity, salt, and thermal oxidation.
Thin and uniform coating with virtually no dimensional change.
The surface retains lubricating oil effectively, enhancing wear and sliding properties.
Provides a smooth, uniform black appearance for improved aesthetics.

Applicable Materials and Components
Materials: All types of steel — structural carbon steel, alloy steel, and general-purpose steel.
Components: Shafts, gears, brackets, pins, bolts, and other mechanical parts.
Maximum work size: 600 × 1230 × 500 mm (processed in a Batch-Type Steam Oxide Furnace).

Advantages of Steam Oxide Film Treatment
Low-temperature process (400–450°C) minimizes thermal deformation.
Produces a uniform, tightly bonded Fe₃O₄ film with long-term anti-rust protection.
Negligible dimensional change, suitable for precision parts.
Beautiful black surface finish with excellent paint and lubricant adhesion.
Environmentally friendly process — uses only steam and hydrogen, no harsh chemicals.

Summary
Steam Oxide Film Treatment is a low-temperature oxidation process that forms a protective Fe₃O₄ oxide layer on steel surfaces using a hydrogen-steam atmosphere. With a processing temperature range of 400–450°C, it enhances corrosion resistance, anti-rust performance, and lubrication properties without altering the dimensions of the component. The result is a smooth, uniform black finish, ideal for precision machinery and structural steel parts that require both performance and aesthetics.

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