To identify possible aqueous products for removal of lacquer from aluminum parts
Date Run:
03/03/2008
Experiment 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.
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