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Trial Number 9

Trial Purpose:

To evaluate past cleaners on next supplied contaminant

Date Run:

03/08/2004

Experiment Procedure:

Seven cleaners were selected from the laboratories database of past testing based on supplied data from client. Four aqueous based cleaners were diluted to 10% using DI water in 250 ml beakers. Three semi-aqueous products were used at full strength also in 250 ml beakers. An eighth product was added as the client's current cleaner and diluted to 10%. All eight products were heated to 130 F on a hot plate.
Twenty-four preweighed ceramic coupons were coated with client supplied dye, Sherwin Incorporated Dubl-Ckek Penetrant DB-51 (68131-40-8). The dye was applied directly to the coupon surface using a swab and then weighed a second time. Three coupons were cleaned in each solution for 5 minutes using stir-bar agitation. Coupons were rinsed in tap water for 15 seconds at 120 F, followed by air blow off at room temperature for 30 seconds. Once dry, coupons were weighed a final time and efficiencies for each cleaner were calculated.

Trial Results:

All eight products removed over 80% of the red dye from the ceramic coupons within five minutes of immersion cleaning. Half of the products still little to no visible amounts of the dye. Of these four products, DBE 6 performed the best, followed by Ink Zapper, SC Aircraft & Metal cleaner and Metabolix E3HB. The table lists the amount of dye initially added, the amount remaining after cleaning and the efficiency for each coupon cleaned.

Cleaner Initial wt Final wt % Removed
Liquinox 0.0265 0.0052 80.38
  0.0160 0.0040 75.00
  0.0293 0.0032 89.08
SC Aircraft 0.0117 0.0013 88.89
  0.0254 0.0023 90.94
  0.0283 0.0013 95.41
Micro 90 0.0254 0.0031 87.80
  0.0182 0.0032 82.42
  0.0174 0.0025 85.63
Metalnox 6314 0.0315 0.0041 86.98
  0.0204 0.0027 86.76
  0.0215 0.0063 70.70
E3HB 0.0373 0.0010 97.32
  0.0140 0.0014 90.00
  0.0114 0.0020 82.46
Inproclean 3800 0.0212 0.0030 85.85
  0.0277 0.0048 82.67
  0.0256 0.0043 83.20
Ink Zapper 0.0164 0.0019 88.41
  0.0106 0.0002 98.11
  0.0224 0.0014 93.75
DBE 6 0.0171 0.0007 95.91
  0.0361 0.0002 99.45
  0.0126 0.0005 96.03

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 five successful products will be retested using ultrasonic energy.

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