The Corrosion Behavior of Ni3Al/Ni3V Two-Phase Intermetallic Compounds in Various Acidic Solutions

被引：3

作者：

Priyotomo, Gadang ^{[1
]}

Momono, Hideyuki ^{[1
]}

Wagle, Sanat ^{[1
]}

Okitsu, Kenji ^{[1
]}

Iwase, Akihiro ^{[1
]}

Kaneno, Yasuyuki ^{[1
]}

Nishimura, Rokuro ^{[1
]}

Takasugi, Takayuki ^{[1
]}

机构：

[1] Osaka Prefecture Univ, Grad Sch Engn, Dept Mat Sci, 1-1 Gakuen Cho, Sakai, Osaka 5998531, Japan

来源：

INTERNATIONAL JOURNAL OF CORROSION | 2012年 / 2012卷

关键词：

D O I：

10.1155/2012/626240

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The corrosion behavior of the Ni3Al/Ni3V two-phase intermetallic compounds with and without minor elements (Nb, Co, and Cr) to be composed of L12 phase (Ni3Al) and a mixed phase of L12 (Ni3Al) and D0(22) (Ni3V) has been investigated by using an immersion test in 0.5 kmol/m(3) HCl, H2SO4, and HNO3 solutions. The surface morphology was observed before and after the immersion test by scanning electron microscope (SEM). The results were compared to those of the L1(2) single-phase Ni3(Si, Ti) and austenitic stainless steel type 304. In all acidic solutions, preferential dissolution of (L1(2) + D0(22)) phase was found in Ni3Al/Ni3V, but no intergranular attack, whereas the attacks took place on Ni-3(Si, Ti). The Ni3Al/Ni3V showed a higher corrosion resistance in HCl solution and a lower resistance in HNO3 solution than Ni-3(Si, Ti) and type 304. The addition of the minor elements enhanced corrosion resistance in HNO3 solution, but not clearly in HCl and H2SO4 solutions. In HCl and H2SO4, their weight losses during the immersion test were almost the same.

引用

页数：6

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