Polytetrafluoroethylene (PTFE) coatings are frequently used on Dissolution bath accessories. Many individual monographs specify this coating on Sinkers, Baskets, Paddles and Vessel interiors. The coating on the accessories can, over time, develop chips or scratches that can expose the substrate to corrosion and affect the results of the test. Technicians handling these coated parts should be familiar with the following guidelines to help extend their service life. Parts with corrosion should be removed from service.
Handling
The PTFE coatings are applied at the factory in order to maximize adhesion and durability. The coating, however, is susceptible to chipping and scratching if not handled gently. When handling these partd, they should never be dropped or allowed to come into contact with other objects in a way that could cause chipping or scratching of the surface coating.
Cleaning
- Never use abrasive materials or cleansers on PTFE-coated parts.
- Thoroughly rinse, dry and inspect these parts immediately after each use. Rinsing with DI water may be sufficient depending on the specific dissolution media used and the product being tested.
- When a cleaning agent must be used, use only mild nonabrasive laboratory cleansers specifically formulated and recommended for use on stainless steel and polymers when present. Ask your QLA Sales Rep for suggested cleaning solutions.
- Always rinse thoroughly with DI water after cleaning with a cleaning solution.
- After final rinse, thoroughly dry with a clean, soft cloth.
- Ultrasonic cleaners are not recommended for cleaning PTFE-coated parts.
- If heat is used for drying, do not exceed 90° C.
By following the handling and cleaning guidelines outlined above, you can help extend the service life of your PTFE-coated dissolution accessories.