HIGH TEMPERATURE OXIDATION BEHAVIOUR OF ALUMINIZED COATINGS ON GREY CAST IRON FABRICATED BY HOT-DIPPING IN A PURE AL OR ALSI11 BATH

1 BUCKI Tomasz
Co-authors:
1 MOLA Renata 1 BĄK Angelika
Institution:
1 Department of Applied Computer Science and Armament Engineering, Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, Al. Tysiąclecia P.P. 7, 25-314 Kielce, Poland, EU, tbucki@tu.kielce.pl, rmola@tu.kielce.pl
Conference:
24th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, June 3rd - 5th 2015
Proceedings:
Proceedings 24th International Conference on Metallurgy and Materials
Pages:
1075-1080
ISBN:
978-80-87294-58-1
ISSN:
2694-9296
Published:
12th January 2015
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
237 views / 92 downloads
Abstract

This paper investigates the oxidation behaviour of aluminized flake graphite cast iron. Aluminized coatings were fabricated by hot-dipping cast iron in a pure Al or AlSi11 bath at 750 oC for 20 min. The microstructure analysis showed that both types of coatings consisted of two layers: an outer layer with a composition similar to that of the aluminized bath and an inner layer with intermetallic phases. Dispersed flakes of graphite were observed in both layers. The coatings fabricated in AlSi11 were thicker than those produced in pure Al. High temperature oxidation tests of aluminized and bare cast iron samples were conducted over a period of nineteen 24-hour cycles. It was shown that flake graphite cast iron hot-dip coated with pure Al or AlSi11 alloy exhibits comparable resistance to cyclic oxidation to uncoated cast iron.

Keywords: hot-dip aluminizing, flake graphite cast iron, intermetallic phases, microstructure, high temperature oxidation resistance

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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