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Trial Number 5

Client Number 182

Project Number 1

Trial Purpose:

To evaluate past successful cleaners on new contaminant

Date Run:

08/26/2002

Experiment Procedure:

The four successful products from the previous trial were again used at full strength and room temperature. An additional product was added to the trial for comparative purposes. All five products were used in 600 ml beakers and degassed for 5 minutes in a Crest 40 kHz ultrasonic tank. Fifteen preweighed coupons were coated with Emerson & Cuming Eccocoat CC 40A Solvent based conductive coating (7440-22-4, 108-88-3, thermoplastic resin) using a hand held swab. Coupons were allowed to sit for 20 minutes and then weighed again. Three coupons were cleaned in each beaker for 5 minutes using ultrasonics. Coupons were rinsed for 15 seconds in a tap water bath at 68 F and dried for 2 minutes using air knives also at 68 F. Once dried, final weights were recorded and efficiencies calculated for each cleaner.

Trial Results:

Only two products, both Bio Chem Systems products, removed the contaminant from the coupons. The table lists the efficiencies for each coupon cleaned.

Table 1. Efficiencies

Cleaner Initial wt Final wt % Removed
Bio T Max 0.7841 0.0024 99.69
  0.4790 0.0011 99.77
  1.1946 0.0022 99.82
DS 108 0.5712 0.5412 5.25
  1.4127 1.3377 5.31
  1.2168 1.1482 5.64
Solsafe 245 1.1079 0.2986 73.05
  0.9153 0.0279 96.95
  1.0718 0.4154 61.24
Ionox HC 2 0.9056 0.8900 1.72
  0.8696 0.8589 1.23
  0.6043 0.5981 1.03
Metabolix 1.0480 1.0011 4.48
  0.7915 0.7707 2.63
  1.2215 1.1370 6.92

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 original effective cleaners will be used to clean the remaining contaminant.

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