To evaluate products for corrosion potential of steel drums.
Date Run:
06/13/2000
Experiment Procedure:
The four products were selected based on environmental indicators for potential replacement cleaners in parts cleaning. Non diluted solutions were poured into 600 ml beakers. Three preweighed steel coupons were placed into each product. The coupons soaked at room temperature for five days. During the time period, observations were made about the surface condition of the coupons. At the end of the five days, coupons were removed from the beakers and photographs were taken using a Kodak digital science DC260 Zoom Camera and observations were recorded. Following the initial photograph, coupons were rinsed in tap water for 30 seconds and wiped dry with paper towel. A second picture was taken and final weights were measured. The chemistries used are listed in Table 1.
Table 1. Cleaning Products
COMPANY PRODUCT
Envirosolutions, Inc. Bio T V-50
Ensolve Systems Grease Feast
North Atlantic Bio-Industries NAB 9000 Hazwell ForBest Sea Wash 8
Figure 1 displays the three stages of the corrosion testing.
Figure 1. Coupon Conditions
Pre-soak
V-50
Grease Feast
NAB 9000
Sea Wash 8
With Out Rinse
V-50
Grease Feast
NAB 9000
Sea Wash 8
With Rinse
V-50
Grease Feast
NAB 9000
Sea Wash 8
The V-50 and Sea Wash 8 were the only ones to not show visible signs of damaging the steel coupons. The NAB 9000 formed a white residue on the coupons within one day of soaking. Grease Feast generated a yellow residue after five days.
Gravimetric analysis revealed that all four cleaners lowered the weights of the coupons. The V-50 was caused the greatest weight change. However, the weight changes did not appear to be the result of any damage to the parts. In fact, the coupons looked cleaner after soaking in the V-50 and Sea Wash 8 products. Table 2 lists the pre- and post-weights of the steel coupons for all four cleaners.
Table 2. Corrosion Test Weights
Cleaner
Coupon
Initial Weight
Final Weight
Weight Loss
V-50
9
32.0396
31.8458
0.1938
10
31.8058
31.5355
0.2703
11
31.9825
31.7037
0.2788
Grease Feast
13
31.9642
31.948
0.0162
14
32.1115
32.0968
0.0147
15
32.0391
32.029
0.0101
NAB 9000
16
31.952
31.9189
0.0331
17
32.0899
32.0521
0.0378
18
32.2124
32.1770
0.0354
Sea Wash 8
19
32.1251
32.0903
0.0348
20
31.7378
31.7150
0.0228
21
31.9352
31.9073
0.0279
Success Rating:
A follow up test, usually based on company input.
Conclusion:
From the visual observations made, both Envirosolutions V-50 and ForBest Sea Wash 8 did not cause damage to the steel surfaces. Ensolve Systems Grease Feast and North Atlantic Bio Systems NAB 9000 were not compatible with steel for extended periods of time.
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