Polarization Controlled Kinetics and Composition of Trivalent Chromium Coatings on Aluminum

Autor:	Daniel Goberman, Lei Chen, Mark R. Jaworowski, Sameh Dardona, Kryzman Michael A
Rok vydání:	2011
Předmět:	Zirconium Chemistry education Kinetics Inorganic chemistry Analytical chemistry chemistry.chemical_element engineering.material Electrochemistry humanities Analytical Chemistry Chromium Coating Aluminium Conversion coating engineering Polarization (electrochemistry)
Zdroj:	Analytical Chemistry. 83:6127-6131
ISSN:	1520-6882 0003-2700
Popis:	Combined in situ spectroscopic ellipsometry and electrochemistry have been employed to monitor, in real-time, the formation of trivalent Cr conversion coatings on polished Al substrates at applied sample potentials. It is found that the formation kinetics and chemical composition of the film can be controlled by adjusting the anodic and cathodic reactions. The growth kinetics are accelerated at more positive anodic potentials or more negative cathodic potentials. At more negative potentials, the percentage of chromium in the coating is found to increase, while the zirconium percentage decreases.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::815ece61054027a113884befd7e9eb9f https://doi.org/10.1021/ac2012416 Zobrazit plný text záznamu