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Trial Number 3

Trial Purpose:

To evaluate products on fourth supplied soil.

Date Run:

04/20/2004

Experiment Procedure:

Six products were selected based on client request for vapor degreasing solvents. Each product was used at full strength in a 250 ml beaker and heated to 96 F on a hot plate. Eighteen preweighed aluminum coupons were coated with the C.P. Hall Co. Plasthall ESO oil (8013-07-8) using a hand held swab. Coupons were weighed a second time to determine the amount of soil added to each coupon. Three coupons were cleaned in each solution for 5 minutes using stir-bar agitation. After cleaning parts were allowed to sit for 10 minutes for drying at room temperature. The coupons were weighed a final time and efficiencies were calculated.

Trial Results:

Five minutes of cleaning did not appear to provide enough cleaning time for this oil. Three products removed over 80% but less than 85% of the soil in five minutes. Two products (HFE 7100 & 7200) removed under 60%. The table shows the amount of soil added, the amount remaining and the efficiency for each coupon cleaned.

Cleaner Initial wt Final wt % Removed
HFE 7100 0.0913 0.0638 30.12
  0.2101 0.0712 66.11
  0.1712 0.0689 59.75
HFE 7200 0.2600 0.0776 70.15
  0.2033 0.1045 48.60
  0.1624 0.0690 57.51
HFE 71DE 0.2856 0.0366 87.18
  0.1735 0.0442 74.52
  0.2198 0.0440 79.98
AK 225 0.1733 0.0431 75.13
  0.2422 0.0176 92.73
  0.1711 0.0255 85.10
Vertrel CCA 0.2271 0.0516 77.28
  0.3007 0.0356 88.16
  0.2999 0.0318 89.40
Vertrel MCA 0.2571 0.0629 75.53
  0.2051 0.0472 76.99
  0.1928 0.0526 72.72

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

Follow up tests will be conducted for all four contaminants using longer times. An attempt will be made to clean using vapor degreasing.

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