A method for investigation of hot corrosion by gaseous Na2SO4

被引：23
作者：
Knutsson, Pavleta [1 ]
Lai, Haiping [1 ]
Stiller, Krystyna [1 ]
机构：
[1] Chalmers Univ Technol, Dept Appl Phys, S-41296 Gothenburg, Sweden
来源：
CORROSION SCIENCE | 2013年 / 73卷
关键词：
Hot corrosion; Superalloy; Sulfidation; SEM; XPS; HIGH-TEMPERATURE CORROSION; COATINGS; BEHAVIOR; ALLOYS;
D O I：
10.1016/j.corsci.2013.04.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel in situ exposure method for investigating hot corrosion of aluminde coatings in the absence of an alkali sulphate melt is presented. The samples are exposed to Na2SO4(g) at a temperature above the dew point of the gas. Results from 100 and 500 h exposures at 900 degrees C of Ni-based In792 covered with SIF232 aluminide coating are presented. Already after 100 h of testing, attack characteristic for Type I hot corrosion is observed. The reactions taking place during the testing are discussed and the results are compared with those from the well-known ex situ salt hot corrosion test. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：230 / 236
页数：7
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