To evaluate supplied products for rust removal from steel coupons
Date Run:
07/25/2005
Experiment Procedure:
Sixteen pre-rusted steel coupons were photographed to establish the baseline level of rust. A coupon was paired with another coupon that had similar amount of rust. One of the paired coupons was wiped for one minute using a paper towel that contained one of the supplied cleaning solution at full strength. Wiping was performed at room temperature. The second coupon was wiped with the other supplied product. Observations were made and a second photograph was taken to compare to the baseline photograph. Coupons were also observed after 24 hours to determine the level of rust that returned.
Trial Results:
The DFC 23 wiped coupons were slightly better than the DFC 30 coupons. Both cleaners were effective in removing rust from the steel coupons. When wiping with DFC 30, there was a lot of foaming that developed. No such foaming was noticed for the DFC 23. The table below lists the observations made for each coupon cleaned. All sixteen coupons started to develop rust after sitting overnight. No difference was noticeable between the two cleaning products.
DFC 23 Cleaned Coupons
DFC 30 Cleaned Coupons
Coupon #
Observation
Coupon #
Observation
22
good
15
good
6
okay
17
okay
27
good
19
okay
35
good
1
good
23
good
28
good
20
good
36
good
24
good
33
good
10
good
18
good
Photographs of coupons before and after cleaning.
Success Rating:
A follow up test, usually based on company input.
Conclusion:
Both products, DFC 23 & 30, removed the rust from the steel coupons after one minute of wiping. DFC 30 had some foam develop.
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