Corrosion of Hydrogen Storage Metal Alloy LaMm-Ni_4.1Al_0.3Mn_0.4Co_0.45 in the Aqueous Solutions of Alkali Metal Hydroxides.

ABSTRACT: Corrosion of pristine AB₅-type metal alloy LaMm-Ni_4.1Al_0.3Mn_0.4Co_0.45 in the aqueous solutions of alkali metal hydroxides of diverse composition and concentration was tested. Correlation was observed between the alloy corrosion intensity in various hydroxide solutions, and its electrochemical capacity in these electrolytes. Mm(OH)₃, CoO(OH), and nickel metal aggregates were detected among the products of selective oxidation of the alloy. High intensity corrosion of the alloy was observed in RbOH and CsOH solutions leading to formation of ternary oxides at the surface of the alloy. Presence of rubidium and cesium ions in the electrolyte were found to create an additional driving force for lanthanides (La and Ce) to leave the lattice of the alloy,

SUBMITTER: Karwowska M 

PROVIDER: S-EPMC6316957 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature