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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