Aluminum oxide cleaning liquid

The used motor shell is very difficult to clean
Oil pollution situation is more complex
May also with dirt and dust
Going to the Alumina Oxides layer is not black cannot use hydrochloric acid, can only use ultrasonic cleaner and cleaner
I come into contact with a similar situation
For your reference
1, automatic ultrasonic cleaning line
High pressure spraying and aluminum cleaner (removal of workpiece surface soil, and heavy dirt)
Ultrasonic aluminum cleaner (thoroughly remove the workpiece surface oil pollution)
Ultrasonic aluminum powder oxide cleaner (removal of oxide layer)
Rinse (if there is oil plus an ultrasonic aluminum cleaner process)
Rinse and drying
2, manual cleaning and ultrasonic oxidation layer
In an aluminum cleaner first
Artificial scrub (using aluminum cleaner, remove dust dirt oil dirties, instead of high pressure spray)
Ultrasonic cleaner to remove oxide aluminum oxide layer
Rinse (if there is oil plus a scrub)