EDP Sciences Journals List
Issue J. Phys. IV France
Volume 03, Number C9, Décembre 1993
Proceedings of the 3rd International Symposium on High Temperature Corrosion and Protection of Materials
Actes du 3ème Colloque International sur la Corrosion et la Protection des Matériaux à Haute Température
Page(s) C9-205 - C9-213
DOI http://dx.doi.org/10.1051/jp4:1993919

Proceedings of the 3rd International Symposium on High Temperature Corrosion and Protection of Materials
Actes du 3ème Colloque International sur la Corrosion et la Protection des Matériaux à Haute Température

J. Phys. IV France 03 (1993) C9-205-C9-213

DOI: 10.1051/jp4:1993919

Ducropur, Ducrolloy - New chromium materials

H.-P. Martinz1, W. Köck1 and T. Sakaki2

1  Metallwerk Plansee, Reutte, Austria
2  Tosoh Corp., Tokyo, Japan


Abstract
"Ducropur" and "Ducrolloy" - powder metallurgically produced chromium and chromium base alloys represent a unique combination of different properties : high strength at elevated temperatures and good corrosion resistance to a large variety of chemicals as well as to hot gases. The present paper shows that Ducropur is one of the most resistant materials (better than LC-Ni) in hot caustic soda applications. Furthermore, it is shown that Ducrolloy Cr44Fe5AlO.3TiO.5Y2O3 is almost inert to boiling concentrated nitric acid. The corrosion rate is lower than that of most HNO3-resistant alloys cited in the literature. Finally, the hot air oxidation/nitridation behaviour of Ducropur can be improved by small additions of rare earth oxides and alloying with iron and aluminum. Alloys such as Cr1La2O3 and Cr44Fe5AlO.3TiO.5Y2O3 form tight protective layers and are promising materials for various hot gas applications.



© EDP Sciences 1993