packages. The Aristartec electrochemical corrosion test technology
has a less than 1% corrosion risk for both types of spray packaging
after 90 days or fewer of testing. The risks for other types of
electrochemical tests have either not been established, or are very
high, such as the 84% risk for the driven can test.
Figure 4: General metal corrosion (tinplated steel detinning is shown
in this example)—metal ion contamination from corrosion could reduce
product efficacy, such as fragrance and foam strength.
Figure 5: Metal pitting corrosion—this causes metal container and metal
foil perforation, resulting in the loss of product or propellant.
22 Spray December 2020
Figure 6: Localized, blistered coating/laminate film—loose pieces of
coating or laminate film could clog valve orifices, preventing product
discharge. Pitting corrosion could also be present under the blisters.
Figure 7: Complete delaminated coating or laminate film—failure modes
are the same as those listed in Figure 6.
Thanks for reading Corrosion Corner and I’ll be back next year.
You can contact me at (608) 831-2076 or rustdr@pairodocspro.com;
or from one of our two websites: www.pairodocspro.com and www.
aristartec.com. Spray
Corrosion Corner