摘要
本文采用电化学及物相分析技术研究了NiAl和NiAi(Fe)金属间化合物在熔融NaCl-(Na,K)_2SO_4中的腐蚀行为及溅射CoCrAlY涂层对NiAi(Fe)耐蚀性能的影响。结果表明,NiAl和NiAl(Fe)合金的耐蚀性能极差,硫化-氧化是合金腐蚀破坏的根据本原因。合金表面不能形成Al_2O_3保护层,Al的氧化相反会加速合金腐蚀。向NiAl合金中添加Fe可在一定程度上改善NiAi(Fe)的耐蚀性能。
Electrochemical techniques combined with physical analysis techniques were employed to study hot cor-rosion of NiAl and NiAl (Fe) intermetallic compunds,and effects of sputtered CoCrAlY coating on hot cor-resion of NiAl (Fe)in molten NiCl - (Na,K)_2SO_4 melt.It is shown that hot corrosion resistunce of NiAland NiAl (Fe) are rather inferior,and sulfidation-oxidation is responsible for the accelerated corrosion.The addition of Fe to NiAl alloy may improve its hot corrosion resistance.The sputtered CoCrAlY coatingmay greatly improve hot corrosion resistance of NiAl (Fe).
出处
《材料工程》
EI
CAS
CSCD
北大核心
1993年第4期1-3,41,共4页
Journal of Materials Engineering
基金
863高技术
国家自然科学基金委员会资助
关键词
金属间化合物
涂层
热腐蚀
NIAL
intermetallic compunds
NiAl
NiAl(Fe)
CoCrAlY coating
hot corrosion
