For the cleaning of the oxide layer on the surface of titanium tubes, the following effective methods can be selected according to the actual situation:
1. Pickling method (chemical cleaning)
It is recommended to use dilute sulfuric acid (concentration 5-10%), hydrochloric acid (5-15%), or nitric acid (10-20%) solution
For stubborn oxide layers, a mixed solution of nitric acid (10%) and hydrofluoric acid (1-3%) can be used
The operating temperature is recommended to be controlled at 30-50℃
The treatment time is generally 5-15 minutes
2. Hydrogen peroxide treatment
Use a 1-30% hydrogen peroxide solution
Treat at room temperature for 15-30 minutes
Especially suitable for applications sensitive to hydrogen embrittlement
3. Alkali etching method (electrochemical cleaning)
Use 1-3 mol/L sodium hydroxide solution
Use with a solution circulation system
End point determination: the surface is uniformly silvery white
Ultrasonic cleaning (including surfactant) is recommended later
4. Subsequent treatment
Use a slow pull cleaning machine to ensure surface cleanliness
Drying temperature recommended 80-120℃
Inspection standard: No stains, water marks, and oxidation marks on the surface
Precautions:
Operators must wear protective equipment (acid-resistant gloves, goggles, etc.)
The pickling process should be carried out in a well-ventilated environment
Waste liquid needs to be discharged after neutralization treatment
For precision parts, it is recommended to conduct a small sample test first
Surface passivation treatment should be carried out on time after the treatment
The above methods can be selected and adjusted according to the degree of oxidation, the oxide layer on the surface of titanium tubes, the titanium tube specifications, and subsequent use requirements. For key components, it is recommended to consult a professional surface treatment engineer.
