Abstract
SummaryPorous anodic film formation on aluminium in phosphoric acid has been examined on deliberately scratched and unscratched regions of the prepared substrate and observed by transmission electron microscopy of stripped anodic films and ultramicrotomed sections of the aluminium substrate and its film. The observations can be divided into micro and macro effects. The micro effects are the previously reported non-uniform growth of the film above fortuitous metal ridges and pore development within preferred cells which occur more quickly on the scratched region. The macro effects are the greater and faster overall pore development, and the consequent thicker porous anodic film, on the scratched region overall. The preferential activities on the scratched region are due to the substrate topography within the scratched region where subsequent anodic film formation creates a large population density of preferred cells for pore development. The zone of influence of the scratch does not spread into the unscrat...
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.
