| Ni-Cr-Mo耐蚀合金在CaCl_2-CaF_2熔盐中的腐蚀行为 |
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| 引用本文： | 彭海健,金军,李德富,胡捷.Ni-Cr-Mo耐蚀合金在CaCl_2-CaF_2熔盐中的腐蚀行为[J].金属学报,2011(9). |
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| 作者姓名： | 彭海健 金军 李德富 胡捷 |
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| 作者单位： | 北京有色金属研究总院; |
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| 摘 要： | 通过全浸腐蚀实验,采用XRD,OM,SEM和EDS研究了Hastelloy C276和Hastelloy N合金在80%CaCl_2+20%CaF_2(质量分数)熔盐中的腐蚀行为.结果表明,Hastelloy C276和Hastelloy N合金均发生晶间腐蚀,其具体形式为Cr和Mo元素沿晶界发生选择性脱溶腐蚀.由于腐蚀层和腐蚀产物对元素扩散的阻碍作用,Hastelloy C276和Hastelloy N合金在熔盐中的腐蚀速率均逐渐减缓,其腐蚀失重C与腐蚀时间t符合C=Kt~n关系.
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| 关 键 词： | Ni-Cr-Mo合金 CaCl_2-CaF_2 熔盐 腐蚀 |
CORROSION BEHAVIORS OF Ni-Cr-Mo CORROSION RESISTENCE ALLOYS IN CaCl_2CaF_2 MOLTEN SALT |
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| PENG Haijian,JIN Jun,LI Defu,HU Jie General Research Institute for Non-ferrous Metals,Beijing.CORROSION BEHAVIORS OF Ni-Cr-Mo CORROSION RESISTENCE ALLOYS IN CaCl_2CaF_2 MOLTEN SALT[J].Acta Metallurgica Sinica,2011(9). |
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| Authors: | PENG Haijian JIN Jun LI Defu HU Jie General Research Institute for Non-ferrous Metals Beijing |
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| Affiliation: | PENG Haijian,JIN Jun,LI Defu,HU Jie General Research Institute for Non-ferrous Metals,Beijing 100088 |
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| Abstract: | The corrosion behaviors of Hastelloy C276 alloy and Hastelloy N alloy in 80%CaCl_2+20%CaF_2(mass fraction) molten salt were investigated by XRD,OM,SEM and EDS. The results show that intergranular corrosion takes place in the two alloys,and the form of intergranular corrosion is a type of selective corrosion,i.e.,the desolutions of Cr and Mo occur along the grain boundary.The corrosion rates of the two alloys decelerate with the increases of corrosion time because of the hindering effect of corrosion product... |
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| Keywords: | Ni-Cr-Mo alloy CaCl_2-CaF_2 molten salt corrosion |
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