Affiliation:
1. Technical University in Košice
2. Technical University of Košice
Abstract
The study investigated the possibilities of determination of corrosion resistance of metal and non-metal (organic) coatings deposited to steel surface in the corrosion environment. To determine the corrosion rate of metal PVD coating based on Ti, we used the method involving measurement of polarization conductivity. Corrosion resistance of galvanic Ni or Ni-Co coatings was determined by measuring free corrosion potential ESCE (against that of saturated calomel electrode SCE), or by means of potentiodynamic polarization relationships according to Tafel. These methods provided the basic corrosion characteristics: corrosion potential Ecorr, instantaneous corrosion rate jcorr and polarization resistance Rp. Corrosion resistance of organic coating Woerodur, which was applied by pressure spray to the substrate pre-treated in various ways, was tested in a salt-fog environment. After the exposure to the respective environment we evaluated the appearance of coating. The aim of the study was to point out to the availability of methods suitable for evaluation of corrosion resistance of coatings, and to the possibilities of their application under real practical conditions.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference4 articles.
1. D. Jakubéczyová, M. Kočík, P. Hvizdoš, Multicomponent Thin Films Deposited by PVD ARC and LARC Technology, Mater. Sci. (Medžiagotyra) 20 (2014).
2. J. Kocich, S. Tuleja, Korózia a ochrana kovov (Corrosion and protection of metals), 4th ed. Technical University of Košice, (1998).
3. M. Hagarová, O. Bláhová, J. Savková, Structure and properties of PVD coatings deposited by ARC and LARC technology, Acta Metall. Slovaca 15 (2009) 221-227.
4. R. Dzedzina, M. Hagarová, M. Halama, Evaluation of the corrosion resistance of electroplating Ni-Co coating by electrochemical methods, Corros. Mater. Prot. 55 (2012), 104-107.