Effect of pre-oxidation on the hot corrosion of CoNiCrAlYRe alloy

被引：39
|
作者：
Chen, L-C [1 ]
Zhang, C. [1 ]
Yang, Z-G [1 ]
机构：
[1] Tsinghua Univ, State Key Lab New Ceram & Fine Proc, Dept Mat Sci & Engn, Beijing 100084, Peoples R China
来源：
CORROSION SCIENCE | 2011年 / 53卷 / 01期
关键词：
Alloy; Oxidation; Hot corrosion; THERMAL-BARRIER COATINGS; OXIDATION BEHAVIOR; BASE SUPERALLOY; SCALES; RESISTANCE; MECHANISM; RHENIUM; TESTS;
D O I：
10.1016/j.corsci.2010.09.045
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of pre-oxidation on the resistance to hot corrosion was examined by corroding the CoNiCrAlYRe alloy at 900 degrees C in molten Na2SO4 Preoxidized specimens featured strong adhesion of oxide scale with uniform multi-layered structure The time of pre-oxidation was crucial for controlling Al content sufficient for subsequent hot corrosion However direct corrosion yielded a defective and non-protective oxide scale which allowed detrimental penetration of sulfur into substrate Sulfur migrating along phase boundary was trapped by yttrium to diminish slightly sulphidation Thus two advantages of proper pre-oxidation treatment were presented as keeping repairing for Al2O3 scale and inhibiting sulfur penetration (C) 2010 Elsevier Ltd All rights reserved
引用
收藏
页码：374 / 380
页数：7
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