The purpose of this experiment was to determine the effectiveness of 4 cleaners in removing Vanishing Oil from TURI general steel coupons using heated immersion and comparing the contact angle of cleaned coupons to that of solvent cleaned cold rolled steel coupons provided by the company.
Date Run:
09/08/2020
Experiment Procedure:
Three general steel TURI coupons were obtained for each of the four cleaners tested. Cleaners were prepared to the following concentration: Liquinox 1%, Surface Cleanse 930 5%, Sta Sol ESS 160 100%, Smart Solve 605 100%. Cleaners were heated to a temperature of 100°F. An initial weight was obtained for all coupons, then coupons were soiled with the Vanishing Oil and a soiled weight was obtained. Once solutions reached the proper temperature, coupons were submerged into their respective cleaners for 15 minutes. After 15 minutes had passed, coupons were submerged into a deionized water bath at 100°F for 30 seconds. Coupons were then dried with an air gun on the cool setting. A clean weight was obtained then the contact angle was determined for each coupon. Contact angles were also obtained for the solvent Cleaned Cold Rolled Steel coupons provided by the company. Effectiveness of the cleaners was then determined.
Trial Results:
Cleaner
Initial wt of cont
Final wt of cont
%Cont Removed
%AVG
Contact Angle
Average Contact Angle
Liquinox
0.0136
-0.0011
108.09
90.72
41.06
49.2
0.0259
0.0011
95.75
48.45
0.018
0.0057
68.33
58.08
Surface Cleanse 930
0.0314
-0.0023
107.32
80.98
4.66
4.01
0.0128
-0.0012
109.38
4.99
0.008
0.0059
26.25
2.37
Sta Sol ESS 160
0.0222
-0.0013
105.86
101.59
53.04
50.85
0.0442
0.0036
91.86
50.96
0.0354
-0.0025
107.06
48.55
Smart Solve 605
0.0214
0.0019
91.12
93.28
4.48
3.42
0.0288
0.0021
92.71
N/A
0.0226
0.0009
96.02
2.35
TCE Cleaned
Cold Rolled Steel
Contact Angle
Average Contact Angle
Total Average
1
95
85.96
75.16
74.02
88.86
2
56.82
61.01
63.5
62.7
3
73.64
78.52
75.06
86.85
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Sta Sol ESS 160 had the best % soil removal with an average of 101.59%. However, none of the cleaners had an average contact angle value to surpass solvent cleaned coupons. Next steps would be to test the cleaners on company cold rolled steel to determine if contact angle could be increased.
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