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Trial Number 2

Trial Purpose:

To evaluate selected cleaners at higher concentrations in an attempt to improve efficiency

Date Run:

10/17/2006

Experiment Procedure:

Three 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.
Nine preweighed coupons were heavily coated with the Matchless Metal Polishing TSX Tripoli (1317-95-9) buffing compound by heating the buffing compound and rubbing it onto the surface of the coupons. Coupons were weighed a second time to determine the amount of buffing compound added. Three coupons were cleaned in each solution for five minutes using minimal stir bar agitation. Coupons 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 coupons were weighed a final time and product efficiencies were calculated.

Trial Results:

Two products removed over 90% of the buffing compound from the brass coupons after five minutes of immersion cleaning. The following table lists the amount of buffing compound applied, the amount remaining and the efficiency for each coupon cleaned.

Cleaner Initial wt Final wt % Removed
Polyspray Jet 790 XS 0.2486 0.0323 87.01
  0.3719 0.0320 91.40
  0.3932 0.0034 99.14
Detergent 8 0.2855 0.0081 97.16
  0.1571 0.0011 99.30
  0.4925 0.0296 93.99
Micro 90 0.2813 0.2078 26.13
  0.2731 0.2688 1.57
  0.2978 0.2297 22.87

Success Rating:

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

Conclusion:

The two successful products, Polyspray Jet 790 XS and Detergent 8, will be used on the second supplied buffing compound.

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