Trial Purpose:
To identify possible aqueous products for removal of lacquer from aluminum parts
Date Run:
03/03/2008Experiment Procedure:
Eight products were selected from the lab's on-line database, www.cleanersolutions.org, based on past testing results matching client supplied information. Seven of these products were diluted to 5% using DI water in 600 ml beakers. The eighth product was used at full strength as recommended by the vendor. All eight products were heated to 130 F on a hot plate.
Twenty-four preweighed 5052 Aluminum coupons were coated with the Stan Chem Inc Red Stop Off (78-93-3, 108-88-3) lacquer using a handheld swab. The coating was allowed to dry for about an hour. Once dry, the coupons were weighed a second time to determine the amount of Red Stop Off applied.
Three coupons were immersed into each solution and cleaned for 5 minutes using stir-bar agitation. Rinsing was performed for 15 seconds using tap water heated to 120 F and followed by 30 seconds of air blow off with dry compressed air at room temperature. Final weights were recorded and efficiencies were calculated for each coupon cleaned.
Trial Results:
Only one product, Ink Zapper, showed any signs of removing the lacquer from the aluminum coupons within 5 minutes of cleaning. Even though the Ink Zapper had a negative efficiency, visual observations revealed that the coating on the coupon could be wiped off to some extent. All of the other products removed less than 5% of the lacquer. The table lists the amount of coating added, the amount remaining and the efficiency for each coupon cleaned.
| Cleaner | Initial wt | Final wt | % Removed |
| Aquavantage 1400 | 0.2017 | 0.1954 | 3.12 |
| 0.2373 | 0.2292 | 3.41 | |
| 0.1611 | 0.1571 | 2.48 | |
| Daraclean 235 | 0.2603 | 0.2582 | 0.81 |
| 0.1633 | 0.1624 | 0.55 | |
| 0.3056 | 0.3013 | 1.41 | |
| Polyspray Jet 790 xs | 0.4048 | 0.3884 | 4.05 |
| 0.1541 | 0.1490 | 3.31 | |
| 0.2505 | 0.2428 | 3.07 | |
| Sopmaster | 0.2543 | 0.2466 | 3.03 |
| 0.2161 | 0.2067 | 4.35 | |
| 0.3411 | 0.3266 | 4.25 | |
| SC 1000 | 0.1328 | 0.1272 | 4.22 |
| 0.2507 | 0.2409 | 3.91 | |
| 0.1398 | 0.1336 | 4.43 | |
| Micro 90 | 0.3145 | 0.3005 | 4.45 |
| 0.2208 | 0.2065 | 6.48 | |
| 0.2395 | 0.2224 | 7.14 | |
| Ink Zapper | 0.1942 | 0.2507 | -29.09 |
| 0.2193 | 0.2712 | -23.67 | |
| 0.4196 | 0.4602 | -9.68 | |
| BG Clean 617 | 0.3245 | 0.3100 | 4.47 |
| 0.2740 | 0.2665 | 2.74 | |
| 0.2915 | 0.2833 | 2.81 |
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.Conclusion:
Due to the limited success of the selected products, an addition set of products will be selected for similar evaluation.
