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Trial Number 2

Client Number 108

Project Number 1

Trial Purpose:

To evaluate the one cleaner not available for the first trials.

Date Run:

07/12/1999

Experiment Procedure:

The seventh cleaner selected based on vendor information and the lab’s Effective Test Conditions Database was tested. The cleaning solution was made into 2% solutions using DI water in 600 mL beakers. Three coupons were weighed prior to cleaning. These coupons were cleaned in the solution for five minutes using stir-bar agitation. Parts were rinsed for two minutes in DI water at room temperature. The parts were dried in a convection oven at 212 F for 15 minutes. After allowing parts to cool to room temperature, final weights were recorded. If weights did not change, the cleaner would be retested at a 5% solution with new coupons. If weights went down, the cleaner would be used in the next phase of testing.

SUBSTRATE MATERIAL: Ceramic-Alumina parts
CONTAMINANTS: DuPont Evanol (Vinyl Alcohol Polymers & Copolymers CAS#s: 9002-89-5, 25213-24-5, 54626-91-4; Methanol Bulk/Packaged CAS #: 67-56-1; Sodium Acetate CAS#: 127-09-3)

Trial Results:

The product tested at the 2% concentration caused the weights of the parts to be decreased. Table 2 lists the weight loss from cleaning. No 5% testing was needed.

Table 2. Weight Changes

Cleaner Initial wt Final wt Weight Loss
Gemtek      
  6.0685 6.0419 -0.0266
  6.066 6.0359 -0.0301
  6.0243 5.9902 -0.0341

Success Rating:

A follow up test, usually based on company input.

Conclusion:

The solution tested decreased the weight of the parts.  Further evaluation will proceed with all selected cleaners.

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