Basic cleaning performance testing was conducted using ASTM G122 as the bases for cleaning.
Five products were used at full strength, heated to 120 F on a hot plate. Fifteen preweighed coupons were coated with Kester Solder Flux 1544 (64-17-5, 78-92-2, 8050-09-7) and allowed to dry for two hours and reweighed. Three coupons were cleaned in each solution for 5 minutes using stir-bar-agitation, rinsed in a tap water bath for 15 seconds at 120 F and dried using air blow off for 30 seconds at 68 F. Coupons were allowed to dry overnight and then reweighed a final time. Efficiencies were calculated.
Note: Bio T Foam Plus was sprayed onto coupons at room temperature and allowed to sit for 5 minutes. The cleaner was then rinsed.
Two products, both dibasic esters, were effective in removing the flux from the coupons within five minutes.