To evaluate potential cleaners on the supplied parts.
Date Run:
12/21/1999
Experiment Procedure:
The eight chemistries were selected based on the previous trial results. Five of these products were diluted to five percent and one to two percent by volume in 600 ml beakers using DI water. These six solutions were heated to 130 F on a hot plate. The other two were used at full strength at room temperature. Table 1 lists the products evaluated and the contaminants removed (1, 2, 3, or 4). Parts were cleaned for three minutes in a beaker using a Crest 40 kHz ultrasonic tank model 4Ht 1014-6. Coupons were rinsed in DI water at 130 F for 30 seconds and dried using a Master Appliance Corp, Hot-air gun model HG-301A at 500 F for one minute. After the parts were dry, visual analysis was used to determine how effective the cleaning was.
Envirosolutions was better at removing the pitch from the steel block than Safe Sciences was. The inserts were still attached to the block after three minutes. Most of the scissors cleaned using the aqueous products looked very clean. A couple of the cleaners, Valtech and U.S. Polychem, had a little difficulty in removing buffing compound from the screw slot located at the pivot point of the scissors. The long handled scissors were not completely cleaned due to the size of the beakers.
Success Rating:
A follow up test, usually based on company input.
Conclusion:
Parts cleaned have been labeled and sent to the client for analysis.
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