Trial Purpose:
To evaluate cleaning effectiveness for several contaminant types using client supplied samples.
Date Run:
07/05/2000Experiment Procedure:
Table 1 lists the various coupon materials used in this evaluation
Table 1. Substrates Used
| Substrate | ID# | Code |
| aluminum | 202-7075 T-6 | AL |
| brass | 202-260 | BR |
| Cu/Ni | 202-715 | CN |
| stainless st. | 202-17-4 HR68 | SS |
Table 2 shows the contaminants and the associated CAS#s applied to the coupons.
Table 2. Contaminants Used
| Contaminant | CAS# | Code |
| lubricant, 423 | 64742-57-0, 64742-62-7, 8052-42-4 | LU |
| grease, KSL-111 | 64742-47-8 | GR |
| oil, Citgo NC400 | 64741-89-5, 8052-42-4 | OI |
| flux, Ersin 5381 | FL |
CONTAMINATING PROCESS USED: Coupons coated using hand held swab
Thirty-three preweighed coupons were contaminated with various contaminants based on vendor recommendations and weighed again. Cleaning chemistries were diluted to 5% using DI water in 600 ml beakers. The solutions were heated to 130 F on a hot plate. Three coupons of the same material, with the same contaminant were cleaned in the specified cleaner for 5 minutes using stir-bar agitation. Coupons were rinsed with tap water at 120 F for 30 seconds and dried at room temperature for 2 hours. Once the coupons were dry, the final clean weights were measured and cleaning efficiencies were calculated. Table 3 lists the cleaning products evaluated.
Table 3. Cleaning Products Used
Multiclean 1568
Alukleen 36
Powerwash Clean BCR
Trial Results:
All three cleaners were very successful in removing the oil from the various types of substrates. The Multiclean solution was did not show good cleaning ability on the grease and lubricant. The Alukleen and the Powerwash Clean BCR removed the nearly all of the lubricant and neither were capable of cleaning the flux compound. The Alukleen was also able to remove the grease from the stainless steel coupons. Tables 4, 5 and 6 lists the results for each cleaning solution.
Table 4. Cleaning Results of Multiclean
| Multiclean 1568 | AL - GR | CN - LU | SS - OI |
| Coupon 1 | 119.05 | 9.89 | 99.28 |
| Coupon 2 | 133.71 | 7.79 | 97.98 |
| Coupon 3 | 206.06 | 62.2 | 96.71 |
| Ave | 152.94 | 26.63 | 97.99 |
| Table 5. Cleaning Results of Alukleen | ||||
| Alukleen 36 | AL - LU | AL - FL | SS - OI | SS - GR |
| Coupon 1 | 88.47 | 2.75 | 92.82 | 98.39 |
| Coupon 2 | 84.69 | 12.37 | 89 | 99.2 |
| Coupon 3 | 88.19 | 3.69 | 91.75 | 98.51 |
| Average | 87.12 | 6.27 | 91.19 | 98.7 |
| Table 6. Cleaning Results of Powerwash Clean BCR | ||||
| Clean BCR | AL - LU | BR - FL | BR - OI | SS - OI |
| Coupon 1 | 90.96 | 94.97 | 100.06 | 82.48 |
| Coupon 2 | 91.69 | 37.59 | 99.79 | 86.27 |
| Coupon 3 | 80.42 | 24.59 | 100.25 | 89.13 |
| Average | 87.69 | 52.38 | 100.03 | 85.96 |
Success Rating:
A follow up test, usually based on company input.Conclusion:
Two of the cleaners, Alukleen and Powerwash Clean BCR, were found to be effective in removing multiple types of contaminants from a variety of surface materials.
