SCS LABCOTER 2 - Making the Promotion Solution; Quality Check, Disposal; How to Use the Promotion Solution

OM-610-1002-1 Operator’s Manual Rev 37
PDS-2010 SECTION 5 OPERATION page 35
SCS coating machines, and is incorporated AP in the coating process. Sections 5.15.1–5.15.3 deal with
wet adhesion promotion.
5.15.1 Making the Promotion Solution
The promotion solution is made of 99% pure isopropyl alcohol (IPA), deionized water (DI), and A-174
solution.
1. Mix equal parts of IPA and DI, then add 0.5% (1 part to 200, by volume) of the A-174. The shelf life
of the solution is 24 hours, so mix only the amount that will be used during that time.
2. Stir the solution with a clean stirring rod for 30 seconds and allow the solution to stand for at least 2
hours (to allow adequate chemical reaction) before using it.
Remember: Storage life of the promotion solution is 24 hours. Discard all solution after this time has
elapsed and mix a new batch.
5.15.2 Quality Check, Disposal
1. Use a pipette or dropper to place 6-10 ml of the promotion solution into a clean, dry 100-ml beaker.
2. Carefully add 3-4 grains of potassium permanganate to the 100-ml beaker.
3. Agitate the sample by gently swirling the beaker contents for 15-30 seconds. DO NOT mix the
sample in any other way.
4. Observe the color of the sample:
• A good solution will turn yellow-brown (much like apple cider). This color indicates that the
solution is ready for production use.
• A bad solution will turn bright pink. This color indicates that a fresh batch of promotion solution
is required.
5. Dispose of the old/bad test solution properly (see MSDS and local regulations for proper disposal of
alcohol plus silane). Rinse the test items and all containers thoroughly in IPA before conducting
another test.
5.15.3 How to Use the Promotion Solution
1. Submerge the parts in the prepared promotion solution for 15-30 minutes.
2. Remove the parts from the solution and allow them to air dry for 15-30 minutes.
3. Submerge the parts in IPA for 15-30 seconds. Agitate the basket of parts up and down several times.
4. Remove parts and drain adequately (approximately 30-60 seconds).
5. Dry parts per requirement before you start the coating operation.
6. Parts should be coated within 30 hours, maximum. If parts are not coated within this time, parts must
be re-promoted, repeating this process.