About Us


BOF - Basic Oxygen Furnace, Thermal Spraying, EIS - Electrochemical Impedance Spectroscopy, Microhardness, Erosive Wear, Mass Loss.


This contribution deals with research results focused on analysis of renovative layers applied by thermal spraying. There were two types of sprayed wires used - formerly used

S-NiCro 80/20 and new cored wire marked DURMAT. Micro hardness of thermally sprayed coatings was measured by Vickers indenter, wear resistance of coatings was checked by erosion test, simulated by abrasive grit blasting. EDX analysis proved the presence of particular structural phases. Higher micro hardness values were found in DURMAT coating and this property led to higher wear resistance of this coating in comparison with previously used S-NiCro 80/20 coating. Test results showed that new coating marked DURMAT-AS-7641 has better properties in comparison with previously used coating from perspective of chemical composition, micro hardness and also erosive wear evaluation. Part of
the experimental work was to determine the electrochemical characteristics of blasted surfaces using the EIS (electrochemical impedance spectroscopy) method.


Acta Mechanica Slovaca. Volume 15, Issue 1, Pages 12 – 21, ISSN 1335-2393


  Evaluation of the Quality of the Renovation Layers Applied by Thermal Spraying Technology


[1] Rigney, D. W., Viguie, R., Wortman, D. J., Skelly, D. V.: Thermal barrier coatings applications and process development for aircraft engines. Journal of thermal spray technology

6, 1997, pp. 167-175

[2] Diekmann, H., Gramberg U.: The Role of Tantalum as a Construction Material in the Chemical Industry. Annual Symposium of the Tantalum International Study Center,

Wien, Oct. 4 - 6, 1994
[3] Vasen, R., Pracht, G., Stover, D.: New thermal barrier coating systems with a graded ceramic coating. ITSC 2002, Essen 2002
[4] Pershin, V., Lufitha, M., Mostaghimi, J., Chandra, S.: Effect of substrate temperature on nickel coating adhesion. Proceedings from Materials solutions 2001, Thermal spray symposium, Ottawa 2001
[5] Cherico, S., Toth, R.: Survey of various protective coatings and deposition technology to exhaust cover BOF lifespan extension. Cleveland, Ohio, 2006
[6] Ambrož, O., Kašpar, J.: Plasma sprayed coatings and their utilization in industry. Brno, 1990, 320 s
[7] Amada, S., Hirose, T.: Influence of grit blasting pre-treatment on the adhesion strength of plasma sprayed coatings: fractal analysis of roughness. Surface and Coatings Technology, 102, 1998, s.132-137

[8] Škublová, L. – Mráziková, R. – Škorík, V.: Vplyv elektroerozívne upraveného povrchu na koróznu odolnosť titánovej zliatiny Ti6Al4V. Transfer inovácií, č.17/2010, 2010,

pp. 116-119
[9] Nauer, G. E.: Modern electrochemical surface treatments for automotive applications, Kplus ECHEM, University of Viena, 2008
[10] Raja, V.S. et al.: Electrochemical impedance behavior of graphite-dispersed electrically conducting acrylic coating on AZ31 magnesium alloy in 3.5 wt.% NaCl solution. Progress in Organic Coatings, Volume 67, Issue 1, January 2010, Pages 12-19
[11] http://www.gamry.com/App_Notes/EIS_Primer/EIS_Primer.htm#Model2
[12] Egri, M.: Application of specific surface treatments with aim of extension of mechanical parts lifespan. Diploma thesis. Technical university of Košice, 2008

Latest Issue

ams 2 2016


Guests Online

We have 23 guests and no members online