To test the effectiveness of Purple Tiger reformulations in cleaning DCC-12 from aluminum substrates.
Date Run:
05/24/2021
Experiment Procedure:
Ten reformulated Purple Tiger products were created and tested: PT 2021, PT 2021A, AHS, GSC, Conc, Conc A, Conc AL, Conc 10%, Conc A 10%, and Conc AL 10%. Three aluminum coupons were obtained and weighed for each of the reformulation products being tested. Coupons were then soiled with DCC-12 and baked in the oven at 400°F, for 20 minutes. After baking, coupons were allowed to cool, and a dirty weight was recorded. Coupons were then loaded onto a Gardner-scrub Straight Line Wash unit set to 10 cycles per minute for 20 cycles. Three pumps of cleaner were applied to each of the respective coupons and four pumps of cleaner were applied to the scrubbing blocks. The cleaner was allowed to sit for 30 seconds. Following the 30 seconds of resting, the SLW unit was run to simulate scrub cleaning. Coupons were then removed from the machine and allowed to dry in air for 24 hours. After the drying period, coupons were weighed, and a final clean weight was recorded. Effectiveness of the cleaners was determined.
Trial Results:
Cleaner
Initial wt of cont.
Final wt of cont.
%Cont Removed
% AVG
PT 2021
2.2256
0.264
88.14
89.43
1.2866
0.1528
88.12
1.805
0.1437
92.04
PT 2021 A
1.3926
0.1482
89.36
109.97
0.6229
-0.3521
156.53
1.0312
0.1646
84.04
AHS
0.9285
0.1135
87.78
86.32
0.6946
0.1734
75.04
1.328
0.0511
96.15
GSC
2.2204
0.1726
92.23
85.43
1.0925
0.1545
85.86
1.6931
0.3688
78.22
Concentration
2.4509
0.2299
90.62
92.79
1.7976
-0.0158
100.88
1.4867
0.1951
86.88
Concentration A
1.8503
0.1002
94.58
89.74
1.3699
0.2542
81.44
1.4520
0.0987
93.20
Concentration AL
0.8738
0.138
84.21
89.75
0.7882
0.0379
95.19
1.0975
0.1113
89.86
Conc 10%
0.5207
0.0423
91.88
92.54
0.5966
0.0407
93.18
0.6448
0.0479
92.57
Conc A 10%
0.7747
0.0857
88.94
84.12
0.8169
0.0665
91.86
0.3339
0.0950
71.55
Conc AL 10%
0.6114
0.0219
96.42
92.71
0.2175
0.0191
91.22
0.3055
0.029
90.51
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Concentration and Concentration AL 10% were the most effective reformulations to clean DCC-12 from aluminum substrates, removing an average of 92.79% and 92.71%. The PT 2021 A reformulation was also effective. However, for one of the coupons tested, excess soil beyond what was added was also removed leading to inflated removal values. Next steps are to send the data to the company for further evaluation.
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