MICROSTRUCTURE AND ELECTROCHEMICAL-BEHAVIOR OF LASER TREATED FE-CR AND FE-CR-SI-N SURFACE ALLOYED LAYERS ON CARBON-STEEL

被引：15

作者：

HUANG, CC

TSAI, WT

LEE, JT

机构：

[1] Department of Materials Science and Engineering, National Cheng Kung University, Tainan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1995年 / 190卷 / 1-2期

关键词：

IRON; CHROMIUM; SILICON; NITROGEN; ALLOYS; CARBON;

D O I：

10.1016/0921-5093(94)09593-L

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Laser surface alloyed Fe-Cr and Fe-Cr-Si-N layers on carbon steel were produced by laser irradiation involving preplaced Fe/Cr and Fe/Cr/Si3N4 powders, respectively. The effects of Cr content (13-25 wt.%) and microstructure on the corrosion behavior of the laser treated Fe-Cr and Fe-Cr-Si-N alloys in deaerated neutral 3.5 wt.% NaCl solution were studied. Potentiodynamic polarization tests and electrochemical impedance spectroscopy measurements were used to evaluate the corrosion resistance of the surface layers. The results showed that the Fe-Cr-Si-N treated layer with a fine duplex phase microstructure had a higher pitting potential than the Fe-Cr treated layers. The passive film resistances increased and the passive current density decreased with increasing Cr content in the Fe-Cr layer.

引用

页码：199 / 205

页数：7

共 24 条

[1] DEVELOPMENT OF MICROSTRUCTURE IN LASER SURFACE ALLOYING OF STEEL WITH CHROMIUM [J].