To use OSSE to determine cleanliness of parts cleaned with new products
Date Run:
10/18/2002
Experiment Procedure:
Two products from the previous trial were selected for cleaning supplied parts. One was diluted to 5% and the other was diluted to 3% using DI water in 1500 ml beakers. Both products were heated to 130 F on a hot plate. Each solution was degassed for 5 minutes in a Crest 40 kHz ultrasonic tank. OSEE readings for five supplied parts were recorded using a PET SQM 100. Six readings were made for each side (Top-knife edge and Bottom). One part was then cleaned using Acetone. Two parts were cleaned in each solution for 6 minutes using ultrasonic energy. Parts were rinsed in DI water at 120 F for 15 seconds followed by drying with a Master Appliance Heat Gun at 500 F for 30 seconds. Once dry parts were dry, OSEE readings were recorded. The parts were then visibly inspected and wiped with a white towel soaked with Acetone to determine cleanliness.
Contaminant: Milacron Marketing Company CIMTECH® 310 metal working fluid concentrate (102-71-6, 78-96-6, 26896-20-8)
Trial Results:
The parts cleaned in the ultrasonic tank resulted in higher OSEE readings than the Acetone wiped part. All cleaned parts had higher average readings than the initial dirty readings. The average Dirty reading was found to be 209 with a standard deviation of 35. The clean readings had a higher standard deviation but were still greater than the dirty readings. The average Clean OSEE readings was 578 with a standard deviation of 220. The table below lists all readings made, averages for top and bottom, overall part average and finally the total average.
Table 1. OSEE Readings.
Cleaner
Part
OSEE Dirty T
OSEE Dirty B
OSEE Cleaned T
OSEE Cleaned B
Acetone
1
154
195
277
349
197
219
369
378
229
208
361
390
252
221
250
363
261
203
361
498
189
263
436
440
Average
214
218
342
403
Overall Ave
216
373
Citrinox
2
153
108
882
262
168
177
847
652
193
244
833
871
213
285
695
799
210
272
782
781
223
233
350
963
Average
193
220
732
721
Overall Ave
207
726
Citrinox
3
180
175
730
279
213
186
840
607
209
194
810
542
181
184
727
648
254
212
774
624
258
215
902
758
Average
216
194
797
576
Overall Ave
205
687
Daraclean
4
162
183
574
278
204
230
414
295
218
247
443
574
188
246
853
630
202
208
281
519
245
189
429
623
Average
203
217
499
487
Overall Ave
210
493
Daraclean
5
133
182
451
604
183
192
962
336
207
195
960
665
192
201
424
637
261
225
962
453
250
248
236
674
Average
204
207
666
562
Overall Ave
206
614
Total Dirty Average
Total Clean Average
209
578
When the parts were wiped, only one part was thought to have any noticeable black residue on it. The one part was cleaned in the Citranox. Upon further review under a microscope, the mark was indistinguishable from other sections of the wipe, and therefore the mark was considered to not be dirt. The wipe that was used to clean the part with Acetone clearly had dirt all over.
Success Rating:
A follow up test, usually based on company input.
Conclusion:
Both cleaners were found to be very effective in removing the black dirt from the supplied parts.
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