st29

Spray Oct 2014

SHAPING YOUR PRODUCT’S FUTURE October 2014 Spray 29 Localized corrosion could be pitting, crevicing and delamination of coatings and laminate films from the package metal. The most common forms of metal localized corrosion is pitting and corrosion inside the crevices formed by aerosol container double seams and the container curlaerosol valve crimp area. The most common form of coating and laminate film localized corrosion is blistering. Vapor phase corrosion Vapor phase corrosion is typically not found in spray packages with internal bags. It is different from liquid phase corrosion in that it is corrosion under a very thin film of liquid. Estimations of the liquid film thickness are around 30 microns thick. General and localized corrosion could occur in the vapor area of a spray package. The mechanism for initiating and propagating includes diffusion of corrosive species, such as water, through the thin liquid film to the spray package surface. In liquid phase corrosion, bulk diffusion is part of the mechanism for initiating and propagating the corrosion. We would be happy to teach our Elements of Spray Package (Aerosol Container) Corrosion short course at your R&D facility. Contact rustdr@pairodocspro.com or visit pairodocspro.com. Send your questions/comments/ suggestions to rustdr@pairodocspro.com. Back articles of Corrosion Corner are available from Spray. Thanks for your interest and I’ll see you in November. Spray Custom Crafted Stand out with packaging uniquely engineered for you. Stunning Design Capture your customer’s eyes and minds. Specialty Shapes Enhance product usability and reinforce your brand. cclcontainer.com COMMITTED TO A Partner You Can Rely On For Packaging Designed to Leave a Lasting Impression.


Spray Oct 2014
To see the actual publication please follow the link above