Trial Purpose:
To continue the search for a cleaner that will remove the same contaminant.
Date Run:
01/10/2000Experiment Procedure:
Eight solutions were selected from the lab’s All Tests database based on past effective cleaning of similar contaminants. Four products were diluted to 20% in 600 ml beakers using DI water. The other products were used at 100%. The solutions were heated to 130 F on a hot plate.
Twenty-four pre-weighed coupons were contaminated and weighed again. Three coupons were placed in each cleaner for five minutes with stir-bar agitation. Coupons were rinsed in a tap water bath for 30 seconds at 120 F and dried using a Master Appliance Corp, Hot-air gun model HG-301A. One coupon from each set was wiped with a paper towel. Observations were recorded and weights were measured. The remaining two coupons were re-immersed into the cleaning solutions and soaked at room temperature for 30 minutes, rinsed observed, wiped clean and weighed. Efficiencies were calculated for all eight products.
SUBSTRATE MATERIAL: Stainless Steel coupons
CONTAMINANTS Ashland Specialty Chemical Co, Acrylic Resin solution, Aroset 1872 Z 40 (CAS#s: 108-88-3, 141-78-6, 142-82-5, 67-63-0)
CONTAMINATING PROCESS USED: Coupons were coated with contaminant with a handheld swab. Coupons were then allowed to dry for one hour.
Trial Results:
The four products used at full strength showed good cleaning after the first five minutes of cleaning. The coupons that were wiped ranged from 87 to 96% removal. The four products used diluted only removed under 20% of the contaminants and only improved to about 40% after the 30-minute cleaning. Table 2 lists the calculated efficiencies for both cleaning times. The observations made at each period of cleaning were recorded in Table 3.
| Table 2. Cleaning Results | ||||||||
| Cleaner | Valtron | Daraclean | All Purpose | Bio T 300 B | Resineater | D-Greeze | 69 MC | SI #4 |
| 5 min with wipe | 7.82 | 9.33 | 9.96 | 93.29 | 92.23 | 87.25 | 16.92 | 95.96 |
| 30 min with wipe | 1.50 | 15.75 | 28.14 | 94.90 | 96.46 | 97.76 | 15.52 | 102.69 |
| 4.70 | 31.13 | 41.22 | 98.72 | 99.21 | 98.72 | 17.71 | 98.86 | |
| Average | 3.10 | 23.44 | 34.68 | 96.81 | 97.83 | 98.24 | 16.62 | 100.78 |
| Table 3. Observation | ||||||||
| Valtron | Daraclean | All Purpose | Bio T 300 B | Resineater | D-Greeze 500 | 69 MC | SI #4 | |
| 5 min w/ wipe | sticky, hard | sticky, hard | dull, sticky | soft | soft | soft, sticky | hard, sticky | easy wipe |
| easy wipe | easy wipe | not mix w/ water | ||||||
| 30 min w/ wipe | poor wipe | poor wipe | poor wipe | little remaining | easy wipe | some residue | poor wipe | easy wipe |
| rub off | not sticky | not sticky | easy wipe | OK wipe | not sitcky | very messy | ||
| rub off | rub off | |||||||
Success Rating:
A follow up test, usually based on company input.Conclusion:
Envirosolutions, Fingerlakes and Sovlent Kleene all had products that removed the contaminant with relatively little difficulty. Even though the Savogran product had a high efficiency, the rinsing of the coupons created a white film. When the coupons were removed to be wiped, there was a lot of the cleaning solutions remaining on the coupons which had to be wiped off in addition to the contaminant.
