To evaluate top two products for spot cleaning on supplied parts using swabs
Date Run:
03/18/2008
Experiment Procedure:
The top two products, Shopmaster RC and SC Actisolv, from the previous trials were used at room temperature. Three supplied dirty aluminum coupons coated with the Stan Chem Inc Red Stop Off (78-93-3, 108-88-3) were wiped with cotton tip swabs until the outer portion of the coupons were free of lacquer. The number of swabs used were noted and the time to clean was recorded. Parts were not rinsed or dried.
Trial Results:
Both products were able to remove the Stop Off from the coupons using the supplied swabs.
Cleaner
Observations
#Swabs
Time
Coupon
Shopmaster RC
Red visible on swabs early
3 wet
8:34
1
4 dry
3 wet
8:53
2
4 dry
3 wet
9:32
3
4 dry
SC Actisolv
2 sides clean after
6 wet
15:16
7
12 minutes - other 2
6 dry
still heavily soiled
6 wet
14:29
5
3 sides clean after
6 dry
12 minutes
5 wet
13:34
6
6 dry
Success Rating:
Results suggest a scale-up feasible match for cleaning chemistry and equipment. Pilot plant study with actual parts recommended.
Conclusion:
The Shopmaster RC appears to be the more effective spot cleaner, requiring less time and fewer swabs to remove the coating from the coupons.
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