Here is the cleanliness analysis results from the parts that you brought down to the lab yesterday. Two tests were done to test the cleaning efficiency of the 10% Daraclean 211 solution as compared to the current vapor degreasing process. The first test was the cotton swap wipe test which you saw in the lab. This showed that there was no distinguishable difference between the tubes cleaned with the Daraclean 212 and the Vapor Degreaser.
The second test I performed was using an OSEE (Optically Stimulated Electron Emission) unit. The OSEE exposes the metal part to UV light and measures the resulting electron emission in the form of a current. Contamination of the metal part will result in a resistance to electron emission and will produce a lower current. OSEE data was collected for both the interior and the exterior of the tubes with the results given below. It appears that the Daraclean 212 is just as effective as your current vapor degreasing operation.
OSEE RESULTS
Cleaned with 10% Daraclean 212
Cleaned in Vapor Degreaser
Dirty as received
interior
exterior
interior
exterior
interior
exterior
58
97
49
96
37
54
59
99
48
91
42
53
66
85
56
117
38
47
69
113
40
98
43
48
80
115
58
72
41
65
57
84
38
88
51
47
81
137
48
108
58
45
63
97
82
115
46
51
67
127
83
103
43
48
54
105
66
90
40
52
76
122
53
127
43
55
55
118
51
132
57
50
65.42
108.25
56
103.08
44.92
51.25
Average
9.51
16.54
14.46
17.46
6.91
5.33
Std Dev
Success Rating:
A cleanliness study, addressing only various analytical techniques.
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