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Trial Number 0

Client Number 210

Project Number 1

Trial Purpose:

To identify cleaners that will be able to remove the polysiloxane based coating

Date Run:

08/07/2003

Experiment Procedure:

Eight cleaners were selected from the lab's database of testing based on client submitted data. Four aqueous products were diluted to 5% concentration using DI water in 600 ml beakers. Four semi-aqueous products were selected and used at full strength also 600 ml beakers. The client's current cleaning was used at the dilution sent to the lab (12%). All nine products were heated to 130 F on a hot plate. Twenty-seven preweighed plastic coupons were coated with PPG Industries, Inc. Hi-Gard 1035 coating (71-23-8, 67-56-1, 64-17-3) using a hand held swab. The coating was allowed to dry and then coupons were reweighed. Three coupons were immersed into a cleaning solution and allowed to soak for 5 minutes at 130 F. Coupons were then rinsed in DI water at room temperature for 15 seconds and dried via air blow off for 30 seconds at room temperature. Final weights were recorded and efficiencies were calculated.

Trial Results:

The four aqueous products removed nearly all of the coating within the 5 minutes of cleaning. The four semi aqueous products were not as effective, but three still removed over 90%.  The client supplied cleaner was also less effective than the other aqueous products tested, removing just under 85%. The table below lists the amount of coating added and remaining for each product tested.

Cleaner Initial wt Final wt % Removed
Hurrisafe 9575 0.1971 0.0004 99.80
  0.1188 -0.0003 100.25
  0.1904 -0.0001 100.05
Multikleen LX 1573 0.1423 -0.0003 100.21
  0.1669 0.0001 99.94
  0.1823 -0.0002 100.11
Shopmaster 0.1809 -0.0002 100.11
  0.2732 0.0019 99.30
  0.2208 0.0013 99.41
Polyspray Jet 790XS 0.1775 -0.0002 100.11
  0.2932 -0.0005 100.17
  0.2160 0.0002 99.91
Safer Stuff 0.1626 0.0164 89.91
  0.2844 0.0215 92.44
  0.1345 0.0160 88.10
Citrus Burst 7 0.1796 0.0043 97.61
  0.2705 0.0453 83.25
  0.2719 0.0221 91.87
Ionox HC2 0.2472 0.0164 93.37
  0.1602 0.0035 97.82
  0.1775 0.0145 91.83
Bio T Max 0.2315 0.1893 18.23
  0.2934 0.1581 46.11
  0.2857 0.0668 76.62
Caustic Pot Ash 0.2092 0.0212 89.87
  0.3246 0.0385 88.14
  0.2339 0.0561 76.02

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 four effective aqueous products will be used to clean the supplied parts (white plastic with stainless steel) using ultrasonic energy to ensure blind holes are being cleaned.

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