Challenges and strategies of surface modification of electrogalvanized coatings for electron microscopy analysis. (July 2016)

• Record Type: Journal Article
• Authors: Jantaping, Narin; Banjongprasert, Chaiyasit; Chairuangsri, Torranin; Patakham, Ussadawut; Boonyongmaneerat, Yuttanant
• Is Part Of: Micron. Volume 86(2016:Jul.)
• Page Start: 48
• Page End: 53
• Publication Date: 2016-07
• Subjects: Characterization -- Electrogalvanizing -- Metallography -- Electrochemical polishing -- Electron microscopy; Microscopy -- Periodicals; Electron Probe Microanalysis -- Periodicals; Microscopy -- Periodicals; Microscopie -- Périodiques; Microscopy; Periodicals; 502.82
• DOI: 10.1016/j.micron.2016.04.006
• Languages: English
• ISSNs: 0968-4328

Abstract

Highlights: We address the problems of sample preparation of electrogalvanized coatings for electron microscopy analysis. Techniques for sample preparation of electrogalvanized coatings including electrochemical polishing are proposed and investigated. The proposed sample preparation techniques can be utilized for FE-SEM, EBSD, and TEM examinations. Abstract: Despite wide usage of electrogalvanized coatings in various applications, characterization studies on their micro/crystal structure, and the understanding of how they correspondingly affect the properties, such as corrosion, are rather limited. This is mainly attributed to some difficulties in preparing and examining the zinc coating layers, owing to their intrinsically low corrosion resistance and refined nano-scaled crystallite size. This study aims to examine such challenges systematically and propose some mitigation strategies. Particularly, sample preparation processes, including surface finishing for metallography and sample thinning processes are explored. Furthermore, a range of electron microscopy techniques, including scanning electron microscopy (SEM), electron back scattered diffractometry (EBSD), and transmission electron microscopy (TEM) are investigated in relation to the achievable clarity of microstructural details of electrogalvanized coatings.