Browse Client Types

Browse past lab clients by general industry sectors

Trial Number 3

Trial Purpose:

To evaluate additional cleaners for the removal of the chemical vapor deposition

Date Run:


Experiment Procedure:

Five solutions were selected based on meeting the following parameters:
System Requirements, high and low pressure spray wash
Contaminants: Salts or silicones
Four solutions were diluted to 20% with DI water in 1000 ml beakers. The fifth product was used at full strength. All five were heated to 140 F on a hot plate. One part was immersed in each solution and cleaned 20 minutes. Observations were made at 5 minute intervals. At the end of cleaning, the parts were rinsed in a tap water spray for 1 minute at 120 F. Parts were wiped dry and observed visually for cleanliness.

Trial Results:

The Buckeye Shopmaster LpH worked very well on the grey, black contaminant as well as the rust. The product was also moderately effective removing the white powders. The MacDermid ND LF Supreme worked very well on removing the rust but not very well on the white powders. The other three products were not effective on the white powders. The following table lists the observations made at 5 minute intervals.

Table 1. Observations

Cleaner Observations  
1 0- some dissolving fair
  5- cloudy fair/okay
  10- more removal okay
  15- very cloudy okay/good
  20- wipe off black okay/good
2 0- little/no dissolving poor/fair
  5- some dissolving fair
  10- removing rust film fair/okay
  15-   okay
  20- wipe off rust okay
3 0- little/no dissolving poor/fair
  5- some dissolving fair
  10- no change fair
  15- no change fair
  20- no change fair
4 0- little/no dissolving poor/fair
  5- teflon coming off fair
  10- rust color in solution fair/okay
  15- still has white on fair/okay
  20-   fair/okay
5 0- little/no dissolving poor/fair
  5- little/some dissolving poor/fair
  10- little/some dissolving poor/fair
  15- no change poor/fair
  20- no change poor/fair

Success Rating:

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


Due to the design of the parts and the difficult nature of the contamination, ultrasonic cleaning should provide the extra cleaning that the spray cleaning is not achieving.  A quick check of the Shopmaster LpH in an ultrasonic cleaner showed improved cleaning effectiveness in less time.

Save Report as a PDF