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Trial Number 2

Trial Purpose:

Evaluation of additional cleaners

Date Run:

08/17/2001

Experiment Procedure:

Two new products were selected from the vendor listing based on supplied information. One cleaner from the previous trial was used as a comparison.
Parts were cleaned for 40 minutes followed by a tap water rinse at 120 F and dried with a heat gun at 500 F.
Observations were made at the end of the trial.

Trial Results:

DuPont's DBE-4 and Ecolink Safe Strip were very effective in removing the paint from the brass parts. The Safe Strip did not tarnish the metal. The following table lists he observations made for each cleaner at 10 minute intervals. The figures show before and after of parts.

Cleaner Time Observation
Shopmaster   10 dissolving paint
  20 some lifting
  30 softening paint
  40 paint remaining
DBE-4 10 dissolving
  20 lifting
  30 good cleaning
  40 nearly all paint gone
Safe Strip 10 dissolving and lifting
  20 bright metal
  30 good cleaning
  40 all paint gone, not tarnished

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

Two products removed all or nearly all of the paint within the 40 minutes of soaking.  These two products did not cause the brass parts to become dark, although they did not improve the brightness.

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