The role of temperature on the corrosion and passivation of type 310S stainless steel in eutectic (Li+K) carbonate melt

被引：38

作者：

Frangini, S.

Loreti, S.

机构：

[1] ENEA CRE Casaccia, IDROCOMB, I-00060 Rome, Italy

[2] ENEA CR Frascati, FIS LAS, I-00044 Frascati, Rome, Italy

来源：

JOURNAL OF POWER SOURCES | 2006年 / 160卷 / 02期

关键词：

310S stainless steel; Li plus K carbonate; passivation; impedance spectra; anodic polarization;

D O I：

10.1016/j.jpowsour.2006.04.068

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The corrosion behavior of type 310S stainless steel was studied in the eutectic Li+K carbonate as a function of temperature by several electrochemical methods. Within the range 600-675 degrees C the steel passivated spontaneously at OCP condition after a few hours of immersion. Active-passive transition was observed in the polarization curves below 600 degrees C and above 675 degrees C indicating a failure to reach a stable passive condition even at prolonged exposure times. Impedance analysis indicates that passivity does not lead to the formation of an impervious barrier layer as denoted by the presence of diffusional components at low frequencies indicating oxide growth. Corrosion rates exhibited a minimum at 675 degrees C at both OCP and at cathode polarization conditions. A mechanism to explain the active-passive transition has been proposed based on the phase transition from LiFe5O8 to LiFeO2. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：800 / 804

页数：5

共 9 条

[1] Biedenkopf P, 2000, MATER CORROS, V51, P287, DOI 10.1002/(SICI)1521-4176(200005)51:5<287::AID-MACO287>3.0.CO
[2] 2-8
[3] Frangini S, 1997, ELEC SOC S, V97, P306
[4] Testing procedure to obtain reliable potentiodynamic polarization curves on type 310S stainless steel in alkali carbonate melts
Frangini, S
[J]. MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION, 2006, 57 (04): : 330 - 337
[5] Effects of temperature and partial pressure of CO2/O2 on corrosion behaviour of stainless-steel in molten Li/Na carbonate salt
Lim, TH
Hwang, ER
Ha, HY
Nam, SW
Oh, IH
Hong, SA
[J]. JOURNAL OF POWER SOURCES, 2000, 89 (01) : 1 - 6
[6] Accelerated corrosion of stainless steels with the presence of molten carbonates below 923 K
Ota, K
Toda, K
Mitsushima, S
Kamiya, N
[J]. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 2002, 75 (04) : 877 - 881
[7] Corrosion behaviour of some stainless steel alloys in molten alkali carbonates (I)
Salih, SA
El-Masri, AN
Baraka, AM
[J]. JOURNAL OF MATERIALS SCIENCE, 2001, 36 (10) : 2547 - 2555
[8] Corrosion behavior and interfacial resistivity of bipolar plate materials under molten carbonate fuel cell cathode conditions
Schoeler, AC
Kaun, TD
Bloom, I
Lanagan, M
Krumpelt, M
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (03) : 916 - 921
[9] Oxidation-lithiation of nickel, iron and cobalt in contact with molten carbonate
Yazici, MS
Selman, JR
[J]. SOLID STATE IONICS, 1999, 124 (1-2) : 149 - 160

← 1 →