Mechanism and kinetics of corrosion decomposition of iron-vanadium alloys in solutions of acids and salts

被引：0
|
作者：
Mordovin, I.V. [1 ]
Kazanskij, E.G. [1 ]
Kochergin, V.P. [1 ]
机构：
[1] Ural State Univ., pr. Lenina 51, Ekaterinburg, 620083, Russia
来源：
Zashchita Metallov | 2002年 / 38卷 / 03期
关键词：
Alloying elements - Corrosion - Decomposition - Inorganic acids - Iron - Reaction kinetics - Salts - Solutions - Vanadium - Vanadium alloys;
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摘要：
Corrosion of iron-vanadium alloys containing 0 to 100% of vanadium is studied in dilute HCl and H2SO4 solutions by gravimetric method and by taking anodic polarization curves. Alloys containing no less than 30% of vanadium are readily passivated in sulfuric acid solution. Local passivity breakdowns (pitting or intergranular corrosion) are observed in HCl solutions. Apparent values of number of electrons, transfer coefficients, exchange currents, and corrosion currents are determined for active alloys. Catalytic action of V(II, III) and V(III) ions in cathodic process in aerated solutions is demonstrated.
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页码：296 / 300
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