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
44.70
73.58
50.42
68.30
70.15
60.67
80.71
76.39
Average
52.02
82.90
47.94
71.25
66.55
54.25
78.41
67.70
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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