中文摘要：

在 0.9% NaCl 答案的焊接激光的 Ti-50.6 百分比 Ni (莫耳分率) 形状存储器合金和碱金属的电气化学的行为被电化学技术作为腐蚀潜力测量调查，线性并且 potentiodynamicpolarization。结果显示焊接激光的 NiTi 合金比碱金属不太产生 pitting 和裂隙腐蚀，它被腐蚀电流密度(J_( corr ))和 phi _(坑)和 phi _( prot )价值之间的吝啬的差别的极化电阻( R_p )和 pitting 潜力(phi_(坑))和减少的增加表明。它被扫描坑能在 potentiodynamic 测试以后在碱金属的表面上然而并非在焊接激光的合金的表面上被观察的电子显微镜显微图证实。腐蚀电阻的改进焊接 oflaser 的 NiTi 合金能在激光焊接之上被归因于包括的几乎完全的溶解。

英文摘要：

Electrochemical behaviors of laser-welded Ti-50.6%Ni（mole fraction） shape memory alloy and the base metal in 0.9% NaCl solution were investigated by electrochemical techniques as corrosion potential measurement, linear and potentiodynamic polarization. The results indicate that the laser-welded NiTi alloy is less susceptible to pitting and crevice corrosion than the base metal, which is demonstrated by the increase in polarization resistance（Rp） and pitting potential（φpit） and decrease in corrosion current density（Jcorr） and mean difference between φpit and φprot values. It is confirmed by scanning electron microscope micrographs that pits could be observed on the surface of base metal but not on the surface of laser-welded alloy after potentiodynamic tests. An improvement of corrosion resistance of laser-welded NiTi alloy could be attributed to almost complete dissolution of inclusions upon laser welding.