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Trial Number 3

Client Number 158

Project Number 1

Trial Purpose:

Evaluating previously tested effective products on second Stubbs rust preventative

Date Run:

09/18/2001

Experiment Procedure:

Three successful cleaners and the two client supplied cleaners were selected from the previous trial. Each product was diluted to 5% with DI water in a 600 ml beaker. Fifteen preweighed steel coupons were coated with the Rustilo DW 924 HF using a hand held swab. The rust preventative was allowed to sit on the coupons for 10 minutes prior to being reweighed. Following the second weighing, three coupons were immersed into each solution and allowed to soak for 3 minutes at 130 F. At the end of the 3 minutes, each coupon was rinsed in a tap water bath at 120 F for 30 seconds and dried with a heat gun at 500 F for 1 minute. After the coupons cooled to room temperature, a final weight was recorded and cleaning efficiencies were calculated.

Rust Preventatives: Castrol Industrial, Inc Rustilo DW 924 HF (64742-53-6, 61790-48-5, 64742-47-8);

Trial Results:

Two of the lab selected cleaners were more effective than the Dasco Clean and the third removed just a little less than the Dasco. All of the lab products were more effective than the Certa Clean. The following table lists the calculated efficiencies and the rank of each cleaning solutions evaluated.

Table 1. Cleaning Efficiencies

Cleaner Coupon 1 Coupon 2 Coupon 3 Average Std Dev Rank
Inproclean 99.10 99.02 99.38 99.17 0.19 1
Dasco Clean 98.10 98.90 99.04 98.68 0.50 3
Beyond 98.26 98.57 97.81 98.21 0.38 4
Multikleen 98.97 97.86 99.63 98.82 0.89 2
Certa Clean 73.82 89.34 87.27 83.47 8.43 5

Success Rating:

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

Conclusion:

The same five products will be used in the next experiment on the third supplied contaminant, Power Stamp II from Rome.

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