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Trial Number 2

Client Number 88

Project Number 1

Trial Purpose:

To replace mineral spirits with a semi-aqueous cleaner

Date Run:

01/25/1999

Experiment Procedure:

Five semi-aqueous cleaners were selected from the lab’s database of vendor product information based on compatibility with brass. Full strength solutions were poured into 50 mL beakers. Teflon shavings were immersed into the beakers at room temperature. The shavings were manually agitated by lifting and lowering. After one minute of cleaning the shavings and parts were rinsed for 15 seconds in tap water at 120 F. Samples were set aside to dry at room temperature. Observations were based on how white the Teflon was after cleaning. In addition to the substrate observations, the appearances of the cleaning solutions were recorded.

SUBSTRATE MATERIAL: Teflon parts and shavings
CONTAMINANTS: Oil-lubricating oil (CAS # 64742-53-6, 64742-52-5)

Trial Results:

All five chemistries performed much better than the aqueous cleaners in the previous tests. Two products had exceptional cleaning of the shavings in only one minute. Table 1 lists the observations and rankings of the five cleaners.

Table 1. Cleaning Observations.

Chemistry Observations Ranking Cleaner Status
Soy Gold 2000 Good cleaning 4 Hazy orange color (orange was its original color)
Vortex Excellent cleaning 1 Clear Yellow (clear was its original color)
EP-921 Okay cleaning 5 Cloudy Yellow (clear was its original color)
HTF-50 Excellent to good cleaning 2 Cloudy Yellow (clear was its original color)
D-Limonene Good cleaning 3 Clear Yellow (clear was its original color)

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 cleaning products, Ecolink Vortex and T-Square HTF-50, showed excellent removal of the oil from the Teflon shavings and parts. Each removed nearly all of the oil form the shavings and parts in under one minute.
Technical information has been included for four of the products (the fifth from Florida Chemical will be similar to EP-921). This information can be obtained by running a query in C:\My Documents\CHEM USED\cleaner used. Select Hazinfoquery. Or it can be found in the hard copy of the notebook located in the locked closet in room 309.

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