Trial Purpose:
To evaluate selected cleaners on supplied parts using immersion cleaning.
Date Run:
10/17/2006Experiment Procedure:
Two alternative products were selected from the previous trial based on effectiveness. Each product was diluted to 10% in 250 ml beakers using DI water and heated to 130 F on a hot plate.
Several silver, brass and copper parts were received coated with various buffing compounds. Six parts were cleaned in each solution for five minutes using minimal stir bar agitation. Parts were rinsed for 15 seconds in a tap water bath at 120 F and dried using a dry compressed air for 30 seconds. Once dry, a final observation was made to assess cleanliness.
Trial Results:
| Cleaner | Part | Observation |
| Polyspray Jet 790 XS | Silver Broach | Not completely clean |
| Silver Bracelet | Looked clean | |
| Silver container | Not completely clean | |
| Silver dolphins | Mostly clean | |
| Silver "coin" | Mostly clean | |
| Brass Jesus | Not completely clean | |
| Detergent 8 | Silver money clip | Not completely clean |
| Silver Marine pin | Looked clean | |
| Silver Ornament | Looked clean | |
| Silver Jesus | Looked clean | |
| Copper fixture | Mostly clean | |
| Brass medal | Not completely clean |
Success Rating:
Test incomplete or inconclusive.Conclusion:
Both cleaning solutions had some success in cleaning the supplied parts. However, not all parts were completely cleaned. Parts have been sent back to the client for analysis.
