Question:
We are currently using perchloroethyene vapor degreasing to remove masking wax from aircraft components. Do you have any suggestions on what process we can use to replace vapor degreasing? A.R.
Answer:
A recent paper, Plating & Surface Finishing, 87(2), 18-19, 2000, discusses a process using a proprietary dewaxing chemical, hot water and an alkaline cleaner. The process is successfully used by a major airline. The steps in the process are:
- Hot water wax removal
- Chemical wax removal
- Hot water rinse
- Second hot water rinse
- Non-etch alkaline cleaner
- Hot water rinse
The paper gives the pros and cons of the process.
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