Acta Univ. Agric. Silvic. Mendelianae Brun. 2018, 66, 203-210
Published online 2018-02-28

Effect of Quench Environment on the Conversion Coatings on Magnesium Alloy AZ91

Barbora Ševčíková1, Stanislava Fintová2, Jaroslav Wassebauer1, Jakub Tkacz1

1Materials research Centre by Faculty of Chemistry, Brno University of Technology, 612 00 Brno, Purkyňova 464/118, 602 00 Brno, Czech Republic
2Institute of Physics of Materials of the Academy of Sciences of the Czech Republic, v.v.i., Žižkova 22, 616 62 Brno, Czech Republic

The aim of the study is to achieve fine microstructure of AZ91, due to the optimized heat treatment processes, which can be easily coated with a normal conversion process as phosphating. Determination of the influence of the AZ91 microstructure, mainly precipitates which are created using different cooling media during the heat treatment and definition of the best heat treatment process parameters are the main experimental sections of the work. The structure of the samples heat treated under different conditions was subsequently compared with the structure of the as cast state of AZ91. The morphology of the conversion coating was studied by scanning electron microscopy (SEM) and amount of individual elements in the deposited coating was determined by EDS analysis.


This work was supported by the project “Materials Research Centre at FCH BUT – Sustainability and Development”, REG LO1211, with financial support from National Programme for Sustainability I (Ministry of Education, Youth and Sports), Czech Republic.


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