Trial Purpose:
To evaluate four effective cleaners on a second contaminant
Date Run:
06/08/2001Experiment Procedure:
The four successful cleaners from the previous trial were again diluted to 5% using DI water in 600 ml beakers and placed in a Crest 40 kHz ultrasonic tank model 4Ht 1014-6. Solutions were heated to 130 F. Twelve preweighed coupons were coated with Chemtrol 331 corrosion inhibitor (102-71-6, 111-42-2) and reweighed. Three coupons were immersed into each solution and cleaned for five minutes. The coupons were rinsed in tap water at 120 F for 30 seconds and dried using a Master Appliance Corp, Hot-air gun model HG-301A at 500 F for 1 minute. Final "clean" weights were recorded and efficiencies were calculated.
Trial Results:
All four products had no problems removing the Chemtrol 221 from the steel coupons. The cleaning time of 5 minutes was more than was required to clean the coupons. The following table lists the calculated efficiencies for each coupon.
| Cleaner | Coupon 1 | Coupon 2 | Coupon 3 | Average | Std Dev |
| 1 | 100.13 | 99.94 | 100.07 | 100.05 | 0.10 |
| 2 | 100.00 | 100.03 | 99.87 | 99.97 | 0.09 |
| 3 | 100.18 | 100.11 | 99.96 | 100.08 | 0.11 |
| 4 | 99.96 | 100.04 | 99.96 | 99.99 | 0.04 |
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.Conclusion:
All four product were effective in removing the corrosion inhibitor. Each will be evaluated for cleaning the Metal Guard 270.
