Table 1 lists the contaminants used by the client.
Table 1. Contaminant Listings
| CAS Removal Search
|
Sources of Contaminants at SCL (Listed by SCL heading)
|
| Total
|
Cleaned Before
|
| CAS #
|
CAS #
|
| 108-88-3
|
108-88-3
|
95-416
|
96-418
|
96-419
|
97-541
|
98-541
|
98-571
|
98-680
|
99-622
|
| 3159-62-4
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 64741-88-4
|
64741-88-4
|
98-679
|
98-561
|
|
|
|
|
|
|
|
|
|
|
|
| 64742-01-4
|
64742-01-4
|
98-679
|
|
|
|
|
|
|
|
|
|
|
|
| 64742-53-6
|
64742-53-6
|
99-695
|
99-688
|
97-549
|
95-406
|
96-449
|
|
|
|
|
|
|
|
|
|
|
|
| 64742-54-7
|
64742-54-7
|
98-679
|
98-561
|
99-695
|
99-692
|
|
|
|
|
|
|
|
|
|
|
|
| 64742-57-0
|
64742-57-0
|
98-679
|
99-695
|
|
|
|
|
|
|
|
|
|
|
|
| 64742-62-7
|
64742-62-7
|
98-679
|
98-561
|
95-406
|
|
|
|
|
|
|
|
|
|
|
|
| 64742-65-0
|
64742-65-0
|
98-679
|
98-561
|
| 68649-01-4
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 72623-87-1
|
72623-87-1
|
98-679
|
| 8032-32-4
|
|
|
|
|
|
|
|
|
|
| 98-679
|
Castrol Motor Oil
|
| 99-695
|
W.A. Wood Oil
|
The eight chemistries used in the cleaning trial were selected based on results obtained from the SCL Effective Tests Conditions database and the Industrial Cleaning Survey: Directory of Vendors Tech Report # 15. Table 2 lists the ETC results
Table 2. ETC Search Results Based on CAS#.
| Products Used to Remove Contaminants
|
| 108-88-3
|
64741-88-4
|
64742-01-4
|
64742-53-6
|
64742-54-7
|
64742-62-7
|
64742-65-0
|
64742-57-0
|
72623-87-1
|
| AG Environmental
|
WR Grace
|
WR Grace
|
EMKAY
|
WR Grace
|
WR Grace
|
WR Grace
|
EMKAY
|
WR Grace
|
|
|
Safe CleanUp
|
Safe CleanUp
|
|
Safe CleanUp
|
Safe CleanUp
|
Safe CleanUp
|
|
|
|
|
AG Environmental
|
AG Environmental
|
|
AG Environmental
|
AG Environmental
|
AG Environmental
|
|
|
|
|
|
|
|
EMKAY
|
|
|
|
|
Table 3 lists all cleaners selected and the concentrations used. The chemistries were diluted to the listed amounts in 400 mL beakers using DI water. The beakers were heated to 130 F (except Envirosolutions-room temp) on a hot plate.
Twenty-four preweighed coupons were contaminated with the mixture of the two oils and weighed again. Three coupons were cleaned in each beaker for five minutes using stir-bar-agitation. Coupons were rinsed in tap water at 120 F for 30 seconds and dried using a Master Appliance Corp, Hot-air gun model HG at 500 F for one minute. After the coupons cooled to room temperature, the final clean weights were recorded and cleaning efficiencies were calculated.
SUBSTRATE MATERIAL: Steel Coupons (202-1010-B79)
CONTAMINANTS: Oil: W.A Wood Co W-373 (CAS #s 64741-44-2, 64742-53-6, 64742-52-5); Castrol GTX Motor Oil SAE 10W-40 (CAS #s 64742-41-2, 64741-88-4, 64742-01-4, 64742-46-7, 64742-54-7, 64742-56-9, 64742-57-0, 64742-62-7, 64742-65-0, 72623-83-7, 72623-84-8, 72623-85-9, 72623-86-0, 72623-87-1)
CONTAMINATING PROCESS USED: The two oils were mixed together, using more of the Castrol oil. The mixed oil was then brushed onto coupons using a hand-held swab.
Three of the cleaners were capable of removing >90% of the contaminant, and only one product cleaned less than 70% of the contaminant from the coupons using stir-bar agitation. Envirosolutions was the most efficient cleaner removing nearly 100% of the oil mixture.
Table 4. Cleaning Efficiencies
|
|
282 GF
|
Safety Wash
|
Super Neutral
|
7300
|
Solsafe 245
|
Soy Gold 2000
|
Micro 90
|
SC A&MC
|
| Coupon 1
|
78.27
|
72.79
|
92.7
|
40.48
|
99.69
|
86.86
|
81.61
|
97.47
|
| Coupon 2
|
81.63
|
70.84
|
94.03
|
14.14
|
99.23
|
90.21
|
69.54
|
88.18
|
| Coupon 3
|
84.15
|
66.91
|
92.14
|
47.06
|
99.82
|
86.75
|
67.91
|
93.28
|
| Ave
|
81.35
|
70.18
|
92.96
|
33.89
|
99.58
|
87.94
|
73.02
|
92.98
|
| Std Dev
|
2.95
|
2.99
|
0.97
|
17.42
|
0.31
|
1.97
|
7.49
|
4.65
|
Increasing the concentrations of the products which cleaned less than 90% should increase the efficiencies. Additional testing could be performed to determine the optimum concentrations for cleaning nearly 100% of the contaminant from the coupons.
The Watson product will not be tested any further due to its limited success in removing the oil mixture.