Corrosion and pitting behaviour of ultrafine eutectic Ti-Fe-Sn alloys

被引：11
作者：
Sueptitz, R. [1 ]
Das, J. [2 ]
Baunack, S. [1 ]
Gebert, A. [1 ]
Schultz, L. [1 ,3 ]
Eckert, J. [1 ,3 ]
机构：
[1] IFW Dresden, D-01171 Dresden, Germany
[2] Indian Inst Technol, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India
[3] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 503卷 / 01期
关键词：
Metals and alloys; Rapid-solidification; Corrosion; Microstructure; OXIDATION; COMPOSITE; GROWTH;
D O I：
10.1016/j.jallcom.2010.05.052
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ultrafine structured Ti70.5Fe29.5 and Ti67.79Fe28.36Sn3.85 eutectic rods comprising of beta-Ti and TiFe phases were prepared by copper mould casting. The corrosion and passivation behaviour were investigated in halide free aqueous media (pH 1-13) by means of potentiodynamic polarisation and potentiostatic current transient measurements. Both eutectic alloys exhibit excellent corrosion resistance due to spontaneous passivation. The passive film compositions grown several nanometres on single phase polycrystalline specimens were analyzed with Auger electron spectroscopy. They consist of oxidized Ti and Fe species. Layers grown in strongly acidic environment are depleted in Fe. Sn was detected only on layers grown on the constituent beta-Ti phase and only in the metallic state. The pitting susceptibility was investigated in strongly acidic media (pH <= 1) containing 0.1-3 M of chloride ions. The Sn-containing eutectic alloy was found to be more susceptible to pitting corrosion. (C) 2010 Elsevier B.V. All rights reserved.
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页码：19 / 24
页数：6
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