Abstract
The magnesium levels were varied from 0.0 to 0.05% in 20μm thick 4.5%Al/Zn galvanized coatings applied to 0.7mm gauge steel under continuous galvanizing conditions. These additions increased the total volume fraction of primary zinc phase (from 6 to 22%) and the number of primary zinc dendrites (from 1500 to 3250 mm-2) as a result of the depression of the eutectic temperature. These changes result in increasing cut edge corrosion on the exposed edges of materials embedded in resin to simulate organically coated steels. There is a systematic increase in zinc loss measured using a scanning vibrating electrode technique from 80 to 185 μg in 24 hours exposure to 5% NaCl. This increase in zinc loss results from an increase in active anode numbers (from 600 to 1700 m-1 cut edge) and from an increase in the number of long lived anodes resulting from the corrosion of large numbers of closely spaced dendrites.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
