Hot corrosion of Ti-46Al-8Ta (at.%) intermetallic alloy

被引：50
作者：
Godlewska, E. [1 ]
Mitoraj, M. [1 ]
Leszczynska, K. [1 ]
机构：
[1] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, PL-30059 Krakow, Poland
来源：
CORROSION SCIENCE | 2014年 / 78卷
关键词：
Intermatallics; SEM; Hot corrosion; TITANIUM ALUMINIDE ALLOYS; OXIDATION BEHAVIOR; AIR;
D O I：
10.1016/j.corsci.2013.08.032
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hot corrosion behaviour of a fully lamellar Ti-46Al-8Ta (at.%) alloy was studied in air under thermal cycling conditions (20-h cycles) at 700 and 800 degrees C. The samples were purposely contaminated with salt deposits consisting of NaCl or Na2SO4 or a mixture of these. The progress of degradation was followed by mass change measurements and visual inspection. Post-exposure examination involved scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The composition of salt deposits clearly influenced the rate and type of corrosion. Sodium chloride appeared especially harmful because of the formation of volatile chloride species. (C) 2013 Elsevier Ltd. All rights reserved.
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收藏
页码：63 / 70
页数：8
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