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Trial Number 3

Trial Purpose:

To find the best fit product for cleaning Leach Garner’s #4 Master draw 419TT from copper and stainless steel surfaces meant to resemble the cleaning of precious metals.

Date Run:


Experiment Procedure:

Coupons of stainless steel and copper were selected and arranged on trays, so that each cleaner had an assigned set of each surface. Before taking initial weights coupons were wiped down with Kimwipes. After taking weights the coupons were promptly soiled and reweighed. All cleaners were gathered in respective bottles and beakers. A stir bar was used in conjunction with a heating plate equipped to stir the solutions. The plates were preheated to about 40°C and thermometers were kept in them to monitor the temperature, except Honeywell’s Solstice PF which boils at room temperature and was kept at about 20°C. The coupons were added to the beakers three of a kind at one time, and then allowed to sit in the heated stirred solution for 15 minutes, in 5 minute increments while observations were taken. Finally, clean weights were taken at the end of all the testing.

Trial Results:

Cleaner Initial wt of cont. Final wt of cont. %Cont Removed %Overall
FluoSolv CX 0.0511 0.0106 79.26  
  0.0508 0.0064 87.4 81.72
  0.0451 0.0097 78.49  
FluoSolv NC 0.0278 0.0016 94.24  
  0.0291 0.0005 98.28 95.38
  0.0345 0.0022 93.62  
Vertrel Sion 0.037 0.0052 85.95  
  0.0314 0.0086 72.61 75.86
  0.0242 0.0075 69.01  
Solstice PF 0.04 0.0122 69.5  
  0.0473 0.0174 63.21 64.31
  0.0347 0.0138 60.23  

Success Rating:

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


Previous testing had been conducted on Leach Garner’s #4 Masterdraw 419TT using stainless steel and copper coupons. It was interesting to see that results were significantly different. While in earlier tests most of the cleaners performed in the high 80’s to 90’s this time around, the percentages varied from mid 60’’s to 90’s. The difference came as a surprise and especially the relatively poor performance of DuPont’s Vertrel Sion. The poor results for Honeywell’s Solstice PF were expected as it has consistently shown to be the least effective of the cleaners. Unexpectedly, it was the two EcoLink FluoSolv products which were the best for cleaning Leach Garner’s #4 Masterdraw 419TT from aluminum at about 40°C.

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