Journal
SURFACE & COATINGS TECHNOLOGY
Volume 222, Issue -, Pages 90-96Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2013.02.009
Keywords
High temperature corrosion; Oxidation; Metal matrix composite; Hardfacing; Cermet
Funding
- Austrian Research Promotion Agency (FFG)
- TecNet Capital GmbH (province of lower Austria)
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Metal matrix composite hardfacings provide various types of heat and wear resistant products. They are widely used in high temperature aggressive environments due to their excellent high temperature corrosion and wear resistance. In this study, Cr3C2-Ni and TiC-NiMo particles were used to reinforce a NiCrBSi matrix in plasma transferred arc welding process. These cermet particle reinforced hardfacings were examined on their oxidation behaviour and high temperature corrosion in different solid salts to optimise the field of application under high temperature conditions. Corrosion behaviour in solid salts is strongly dependent on the corroding anion. Cr3C2-Ni reinforced hardfacings behave better in oxidative and sulphate/phosphate environment, while TiC-NiMo hardfacings show better resistance against chlorine and carbonate ions up to 700 degrees C Additionally, oxidation is no critical exposure for these types of hardfacings. (C) 2013 Elsevier B.V. All rights reserved.
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