To identify possible alternatives to toluene for manual wax removal.
Date Run:
10/19/2009
Experiment Procedure:
Nine products were selected from the lab’s on-line database, www.cleanersolutions.org, based on client supplied information. All were used at room temperature. Five alkaline aqueous cleaners were diluted to 5% using DI water in 300 ml beakers. Four cleaners were used at full strength. Twenty-four preweighed aluminum coupons were coated with wax manually without heat gun and allowed to dry for 24 hours at room temperature. The contaminated coupons were weighed again to determine the amount of soil added. Each cleaner tested with three coupons. Three coupons were placed into a Gardner Straight Line Washability unit. A Kimberly Clark Reinforced paper towel was attached to the cleaning sled and soaked with 5-7 sprays of cleaning solutions. Each coupon was sprayed 3 times with the same cleaning solution. Coupon was cleaned for 18 cycles (~30 seconds) straightly. At the end of the cleaning, coupons were dried at room temperature naturally. Final weights were recorded and efficiencies were calculated and recorded.
Trial Results:
Three products were effective in removing the wax with a manual wiping action. The table lists the amount of soil initially added and the amount remaining after cleaning and the product efficiency for each coupon cleaned.
Product
Initial wt
Final wt
% Removed
Buckeye Shopmaster RC 100%
0.0245
0.0009
96.32
0.0360
0.0008
97.77
0.0257
0.0015
94.16
Gemtek SC Aircraft metal cleaner 5%
0.0244
0.0029
88.11
0.0257
0.0036
85.99
0.0444
0.0089
79.95
Biochem Solsafe 245 100%
0.0425
0.0037
91.29
0.0381
0.006
84.25
0.0483
0.0106
78.05
AG Environment Soy Clear 1500 100%
0.0524
0.0181
65.45
0.0587
0.018
69.33
0.0405
0.0198
51.11
MacDemid ND LF Supreme 5%
0.0547
0.0163
70.20
0.0468
0.0184
60.68
0.0496
0.0185
62.70
Alconox Detergent 8 5%
0.0329
0.0052
84.19
0.0265
0.0116
56.22
0.0340
0.0040
88.23
Hurrisafe Hurrisafe 9100 5%
0.0449
0.0121
73.05
0.0397
0.0112
71.78
0.0362
0.0150
58.56
Activion
0.0494
0.0141
71.45
0.0449
0.0086
80.84
0.0387
0.0193
50.12
Hurrisafe Hurrisafe S-910 5%
0.0315
0.0162
48.57
0.0318
0.0125
60.69
0.0592
0.0109
81.58
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Three products (Shopmaster RC, SC Aircraft metal cleaner, Solsafe 245) removed more than 85% of the wax from aluminum coupon. A follow up test will be conducted using longer cleaning times.
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