Trial #2
To evaluate products for corrosion potential of steel drums.
There are no related objects.
One product was selected based on environmental indicators for potential replacement cleaners in parts cleaning. Two dilutions, 100% and 5% were poured into 600 ml beakers. Three preweighed, prephotographed 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 photograph, coupons were rinsed in tap water for 30 seconds and wiped dry with paper towel. A final picture was taken and final weights were measured.
SUBSTRATE MATERIAL: Steel 202 ZP (SAE-1020CR)
CONTAMINANTS: None
Figure 1 displays the three stages of the corrosion testing.
Figure 1. Coupon Conditions
Presoak After Soak After Wash
Both cleaning solutions caused changes in the appearance of the coupons after soaking. As seen in Figure 1, the 100% solution made the coupons become very dark in color and only lightened slightly after it was rinsed in tap water. The 5% solution started forming white deposits on the coupons. Both solutions resulted in a slight weight loss. Table 2 lists the changes in weight before and after rinsing.
Table 2. Weight Changes
| Hurrisafe 5%
|
Hurrisafe 100%
|
| Initial Wt
|
Final Wt
|
Wt loss
|
Initial Wt
|
Final Wt
|
Wt loss
|
| 32.079
|
32.0592
|
0.0198
|
32.0648
|
31.996
|
0.0688
|
| 32.0111
|
32.008
|
0.0031
|
32.0702
|
31.954
|
0.1162
|
| 31.8739
|
31.8727
|
0.0012
|
31.7082
|
31.6232
|
0.0850
|
| 32.0790
|
32.0540
|
0.0250
|
32.0648
|
31.9887
|
0.0761
|
| 32.0111
|
31.9874
|
0.0237
|
32.0702
|
31.9343
|
0.1359
|
| 31.8739
|
31.8509
|
0.0230
|
31.7082
|
31.6127
|
0.0955
|
| white crust developed
|
coupons darkened
|
Hurrisafe 9450 resulted in an effective compatibility with the steel coupons.
No relation