Abstract
The present study demonstrated that alloying had an effect on the photo corrosion rates of zinc coated steel. The corrosion rates of 99·9%Zn, galvanise (>99Zn), galfan (95Zn–5Al), galvanneal (90Zn–10Fe) and galvalume (43Zn–55Al–1·5Si–0·5Fe) were all compared by immersion in flowing fresh water for four months. One set of samples was exposed to ultraviolet (UV) fluorescent lamps, while the second set was up stream and illuminated only by the natural day–night lighting. The field test demonstrated that the UV light exposure increased the corrosion rates of all the zinc alloys tested. Laboratory experiments with photoelectrochemistry showed that alloying changed both the flat band potential and the photospectrum. The flat band potential is the potential where the photocurrent goes to zero. The samples with the more negative flat band potentials also had the higher corrosion rates. This correlation between the flat band potential and the corrosion rate provides a possibility for designing corrosion resistant alloys.
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.
