Abstract
The present study investigates the effect of different conversion bath agitation and stirring conditions on the generation of Zr‐based thin film conversion coatings for steel, zinc galvanized steel, and aluminum substrates. Therefore, samples were immersed in a copper containing fluoric acid of zirconium. Film formation was monitored in situ via open circuit potential (OCP) measurements recorded during the pre‐treatment of the samples in solution. The resulting thickness and elemental distribution of the obtained Zr‐based coatings formed with and without stirring were analyzed ex situ by means of high‐resolution Auger electron spectroscopy (AES) depth profiles. Under the studied conditions, the conversion film thickness on AA6014 and cold rolled steel increased three and two times as a result of stirring. For hot dip galvanized steel, a thickness increase of 400% was achieved. The data point at mass transfer as the dominant factor for film formation. In this context, specific relations for each metal substrate type were detected.
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.
