Evaluation of the electrochemical performance of Ag containing AAO layers after extended exposure to a model corrosive medium

Journal of Electrochemical Science and Engineering

卷:10

Christian Girginov¹  Aleksander Tsanev²  Georgy Avdeev³  Stephan V. Kozhukharov⁴  Denitsa Kiradzhiyska⁵ 

[1] Department of Physical Chemistry, University of Chemical Technology and Metallurgy, Sofia, Bulgaria;

[2] Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria;

[3] Institute of Physical Chemistry, Laboratory of X-Ray Diffraction Methods, Bulgarian Academy of Sciences, Sofia, Bulgaria;

[4] LAMAR Laboratory for Advanced Materials Research, University of Chemical Technology and Metallurgy, Sofia, Bulgaria;

[5] Medical University - Plovdiv, Department of Chemical Sciences, Faculty of Pharmacy, Plovdiv, Bulgaria;

关键词: al-o-ag layers;    porous structures;    compositions;    protective abilities;   

DOI  :  10.5599/jese.820

来源: DOAJ

【 摘 要 】

The coating procedure appears to be an indispensable finishing stage in the production of Al based industrial products, engineering facilities and equipment. For this reason, there is an ever-increasing interest towards the elaboration of reliable corrosion protective layers with apparent coverage, adhesion, and barrier properties. In this sense, both the for­ma­ti­on of anodized aluminum oxide (AAO) layer and its further modification with silver enable the elaboration of advanced (Al-O-Ag) films with extended beneficial charac­te­ris­tics. The present research activities are aimed at the determination of the corrosion pro­tective properties of electrochemically synthesized Al-O-Ag layers on the technically pure AA1050 alloy. The structures and compositions of the obtained Al-O-Ag layers were characterized by X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS). The research activities were accomplished by means of two independent electrochemical characteri­za­tion methods: electrochemical impedance spectroscopy (EIS) and potentio­dynamic scan­ning (PDS). The electrochemical measurements were performed after 24, 168 and 672 hours of exposure to 3.5 % NaCl solution used as a model corrosive medium (MCM), in order to determine the barrier properties and durability of the elaborated Al-O-Ag layers. The analysis of the obtained results has undoubtedly shown that the proposed electro­chemical Al-O-Ag layer formation can successfully be used for the creation of self-standing layers with apparent corrosion protective properties. Besides, Al-O-Ag system can be used as a basis for development of efficient protective layers suitable for application in biologically contami­nated media.

【 授权许可】

Unknown