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Trial Number 0

Trial Purpose:

To evaluate selected cleaners for the removal of graphite based colloidal mold release agent.

Date Run:

07/28/2005

Experiment Procedure:

Seven products were selected based on similar testing from the laboratory's database of test results. Five alkaline products were diluted to 5% using DI water in 600 ml beakers. Two acidic products were also selected. One product was diluted to 6% and the second was diluted to 20% based on vendor recommended concentrations. Water was also evaluated. All eight beakers were heated to 130 F on a hot plate.
Eighteen preweighed aluminum coupons were coated with the Acheson Colloids Co Aquadag M mold release agent (CAS#: 7782-42-5, 84122-50-6, 70131-67-8, 1333-86-4, 107-21-1, 9002-84-0). The mold release was initially dried for 5 minutes using a Master Appliance Heat Gun at 500 F. The coupons were then subjected to another 10 minutes of drying. Coupons were allowed to sit overnight, followed by 2 hours of drying in an oven at 500 F. After the drying, coupons were allowed to cool to room temperature and weighed a second time to determine the amount of soil added to the coupons.
Three coupons were cleaned in each solution for 5 minutes using stir-bar agitation. Coupons were rinsed in a tap water bath for 15 seconds at 120 F and dried using compressed air blow off at room temperature for 30 seconds. Final weights were recorded and efficiencies were calculated.

Trial Results:

A couple of products removed over 50% of the soil and another three removed over 20%. The table below lists the amount of soil added, the amount remaining and the efficiency for each coupon.

Cleaner Initial wt Final wt % Removed
815 GD 0.0014 0.0014 0.00
  0.0030 0.0021 30.00
  0.0014 0.0009 35.71
SC Aircraft & Metal 0.0027 0.0027 0.00
  0.0037 0.0036 2.70
  0.0013 0.0013 0.00
Micro 90 0.0048 0.0023 52.08
  0.0036 0.0031 13.89
  0.0063 0.0057 9.52
Inproclean 3800 0.0067 0.0030 55.22
  0.0078 0.0039 50.00
  0.0031 0.0016 48.39
Polyspary Jet 790 P 0.0112 0.0090 19.64
  0.0020 0.0017 15.00
  0.0018 0.0017 5.56
Citranox 0.0125 0.0053 57.60
  0.0020 0.0019 5.00
  0.0054 0.0047 12.96
Coil Bright 0.0092 0.0027 70.65
  0.0027 0.0016 40.74
  0.0080 0.0024 70.00
Water 0.0049 0.0047 4.08
  0.0118 0.0095 19.49
  0.0032 0.0031 3.12

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 products that showed some cleaning will be retested using ultrasonic cleaning.

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