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Trial Number 0

Trial Purpose:

To identify a low or non voc cleaner for the removal of oil from brass materials.

Date Run:

02/01/2000

Experiment Procedure:

Eight cleaners were selected the lab’s database of effective testing and Industrial Cleaning Survey: Directory of Vendors 4th edition. Six solutions were diluted with DI water to five percent by volume in a 600 ml beaker. The other two products were diluted to 10% as suggested by the vendor. Twenty-four preweighed coupons were coated with the supplied oil and weighed again. Three coupons were cleaned in a solution for five minutes at room temperature using stir-bar agitation. After cleaning the coupons were rinsed for 15 second in tap water at 120 F and allowed to air dry for two hours. Following the drying, final clean weights were recorded and efficiencies were calculated.
SUBSTRATE MATERIAL: Brass Coupons
CONTAMINANTS: Oil-Texaco Lubricant Company Cleartex D (CAS#: 64742-65-0, 68527-02-6)
CONTAMINATING PROCESS USED: Coupons were coated with oil using a hand held swab.

Trial Results:

Three cleaners, Chrisal, SWR Corp & Oakite, were capable of removing over 70% of the oil from the brass coupons at room temperature. Two solutions, Valtech and Envirosolutions, removed about 67% and the remaining solutions cleaned less than 55% of the contaminant. Table 2 lists the calculated efficiencies for each solutions evaluated.

Table 2. Room Temperature Cleaning

Cleaner Alconox Chrisal Savorgran SWR Corp Valtech C&D Oakite Envirosolutions
Coupon 1 53.18 87.69 52.58 73.79 66.42 45.85 83.32 60.72
Coupon 2 58.18 87.42 40.81 71.67 63.08 56.24 71.19 65.98
Coupon 3 44.7 73.58 50.42 68.3 70.15 60.67 80.71 76.39
Average 52.02 82.9 47.94 71.25 66.55 54.25 78.41 67.7

Success Rating:

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

Conclusion:

Since most of the cleaners selected removed a majority of the contaminant while at room temperature, an additional test will be performed using all cleaners heated to 130 F.

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