Surface treatment process for titanium rods!

The core of titanium rod surface treatment is to remove oxidation, remove pollution layer, improve smoothness and corrosion resistance.

Full process of titanium rod surface treatment

1. Mechanical pretreatment (mandatory)

Turning/rough grinding

Remove forging skin, cracks, and oxide skin to ensure roundness and straightness.

Sandblasting/Shot Blasting

Used for roughening surfaces or removing heat-treated black skin.

2. Chemical acid washing (key: dehydrogenation, decontamination, and oxidation)

Common acid solution: nitric acid+hydrofluoric acid (HNO ∝+HF)

Function:

Remove the oxide layer, nitride layer, and pollution layer

Unified surface color, revealing the natural metallic color

Improve the adhesion of subsequent polishing and anodizing

main points:

Strictly control concentration, temperature, and time

After pickling, it is necessary to rinse with a large amount of water and neutralize it

Prevent over corrosion and hydrogen embrittlement

3. Bright treatment (selected according to accuracy)

(1) Rough polishing/semi precision polishing

Sand belt grinding and grinding wheel grinding can improve surface uniformity.

(2) Fine polishing/mirror polishing

Mechanical polishing: up to Ra ≤ 0.8 μ m, 0.4 μ m, 0.2 μ m

Electrolytic polishing: more uniform and stress free surface

4. Passivation/Bright Annealing (Anti corrosion Strengthening)

Vacuum annealing/argon protected annealing

Stress relief, surface gloss without oxidation.

Chemical passivation

Further strengthen the oxide film and improve corrosion resistance.

5. Special surface treatment (selected as needed)

anodizing

Can be used in color (blue/black/gold, etc.) to improve the hardness and insulation of the film layer.

Coating/Spraying

Used for wear-resistant, thermal insulation, and insulation scenarios (for industrial equipment).