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Toxics Use Reduction Institute · Surface Solutions Laboratory
Toxics Use Reduction Institute

Surface Solutions Laboratory

Trial Report

Trial Number 6

(Client Number 276, Project Number 1)

Trial Purpose: To evaluate selected products on second type of supplied parts using ultrasonic cleaning

Date Run: 03/09/07

Experiment Procedure:
Five products were selected from previous trial based on effectiveness. One product was diluted to 10% using DI water and the other four were used at full strength in 600 ml beakers. Each solution was heated to 130 F in a Crest 40 kHz ultrasonic tanked filled with water. The solutions were degassed for 5 minutes.
Five stainless steel rings without a lacquered finish and coated with Jackonslea Grey Color 305 A (1344-28-1) were cleaned in each solution at 1 minute intervals using 40 kHz ultrasonic cleaning. Rings were rinsed for 15 seconds in 120 F tap water and dried using compressed air at room temperature for 30 seconds. If the rings were not completely clean after the initial 1 minute, the rings would be cleaned for another 1 minute. In addition, if the rings were not completely cleaned after 5 minutes, cleaning would be stopped.

Trial Results
All five products worked in under 4 minutes of cleaning. The table lists the observations for each ring cleaned at the various time intervals. 
Order of observations from worst to best: Not clean

Success Rating
Results suggest a scale-up feasible match for cleaning chemistry and equipment. Pilot plant study with actual parts recommended.

All five cleaners worked well in under 4 minutes of cleaning on both types of rings, unlacquered and lacquered. Parts have been sent back for inspection.