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Trial Number 1

Trial Purpose:

To evaluate selected cleaners for the removal of specified CAS#s.

Date Run:

05/25/1999

Experiment Procedure:

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.

Trial Results:

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

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

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.

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