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Trial Number 3

Trial Purpose:

To evaluate the efficiency of three cleaners on GS 34 Soil-1 from stainless steel coupons using immersion technique.

Date Run:

12/10/2013

Experiment Procedure:

Two sets of stainless steel coupons were weighed. Both sets were soiled with GS 34 Soil-1. The oil mix was applied at the loading of ~100mg. The soiled coupons were oven dried for 30 minutes with 40 °C. Dirty weights were recorded for all of the coupons.

The nClean product was 6 oz/gal (4.7%), the Multipurpose Fury 14oz/gal (11%) and the Krud Kutter at the supplied ready to use concentration. Three coupons were placed in a Gardner Straightline Washability unit and spray with a cleaning solution and allowed to soak for 20 minutes. After soaking, the unit was run for 20 cycles (33 seconds) followed by a quick spray rinse using tap water at room temperature. Final weights were recorded the following day. Efficiencies were calculated and recorded.

In addition to the manually wiped coupons, two sets of coupons were sprayed with the cleaners. The first batch was allowed to sit for 20 seconds and another for 20 minutes. No wiping was used and the coupons were only rinsed with tap water. Final weights were recorded the following day. Efficiencies were calculated and recorded.

Soil 1: Maintenance soil = 10 grams of carbon black, 10 grams iron oxide, 100 ml WD-40, 100 ml hydraulic oil, 100 ml gear oil.

Trial Results:

The manual wiping of the maintenance soil was effectively removed with each of the three products. The nClean had the highest removal under these conditions.
During the apply and rinse clean all three products had little removal when the soak time was under 30 seconds. However, when allowing the products to soak for 20 minutes, results were improved. The products performed in a similar manner to the manual wiping with nClean having the highest soil removal at 88.55%. These two tests were to help determine if the force of the water rinse was removing the soil or if the cleaning product was responsible for cleaning.

Cleaner Initial wt Final wt % Removed
nClean - wipe      
  0.0931 0.0014 98.50
  0.0597 0.0008 98.66
  0.0970 0.0027 97.22
Multiclean Fury -wipe      
  0.0783 0.0010 98.72
  0.2000 0.0008 99.60
  0.0778 0.0056 92.80
Krud Kutter - wipe      
  0.1600 0.0033 97.94
  0.0800 0.0062 92.25
  0.1361 0.0042 96.91
nClean - no wipe no soak      
  0.2121 0.0759 64.21
  0.0535 0.0382 28.60
  0.0882 0.0548 37.87
Multiclean Fury - no wipe no soak
  0.1167 0.0611 47.64
  0.0959 0.0474 50.57
  0.0742 0.0452 39.08
Krud Kutter - no wipe no soak
  0.2744 0.1121 59.15
  0.2717 0.1675 38.35
  0.1080 0.0768 28.89
nClean - no wipe 20 soak      
  0.1168 0.0178 84.76
  0.1164 0.0124 89.35
  0.1171 0.0099 91.55
Multiclean Fury - no wipe and 20 soak
  0.1150 0.0096 91.65
  0.1531 0.0345 77.47
  0.1179 0.0117 90.08
Krud Kutter - no wipe and 20 soak
  0.1786 0.0545 69.48
  0.1164 0.0430 63.06
  0.1402 0.0492 64.91

Success Rating:

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

Conclusion:

The nClean product worked better than the two comparative products under the manual wiping and extended soak and rinse scenarios.

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