Abstract
It has been reported that the formation of uniform anodic oxidation coatings on aluminum in baths of mono-carboxylic acids (formic, acetic, propionic, butyric, valeric and benzoic acids) was difficult, and local corrosion on the surface was always observed.In the present paper, the anodization of aluminum in mono -carboxylic acids (formic, acetic, propionic, butyric and lactic acids) was investigated by the constant voltage method (50V, formic acid bath: 15V).Uniform anodic oxidation coatings was prepared in the above baths, and SEM observation of film surfaces and cross-sections revealed that the films had larger size pores (600-700Å) and cells than films formed in a sulfuric acid bath. It was observed that cells of the films dissolved in mono -carboxylic acids and fluoride ion were annexed in the upper parts of film.In terms of dyeing affinity, the films were superior to films of the same thickness prepared in a sulfuric acid bath.
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.
