Intergranular corrosion of a Fe-Cr alloy surface enriched in Mo or Ni by electron beam alloying

被引：0
|
作者：
Vignaud, C [1 ]
Keddam, M [1 ]
Pillier, F [1 ]
Tosto, S [1 ]
Nenci, F [1 ]
机构：
[1] ENEA,CRE CASACCIA,I-00060 ROME,ITALY
来源：
INTERGRANULAR AND INTERPHASE BOUNDARIES IN MATERIALS, PT 2 | 1996年 / 207-卷
关键词：
electrochemical properties; corrosion grain boundaries; surface modification; STEM; EDX; PEELS;
D O I：
10.4028/www.scientific.net/MSF.207-209.781
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A superficial layer, enriched in Mo (2 to 8 at. %) and Ni (12 wt %) onto a FeCr alloy substrate, has been obtained using the electron beam alloying technique. The crystallographic structure of the melted layer is identified by SEM and TEM. The potentiodynamic current-voltage curves are recorded and the intergranular corrosion resistance is evaluated after potentiostatic attack in the transpassive range in 0.5 M H2SO4. The influence of the matrix impurities as C, P, Ti, and S must be taken into account, In fact, some elements may segregate in the grain-boundaries of the new alloy and in some cases induce a harmful intergranular corrosion.
引用
收藏
页码：781 / 784
页数：4
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