6533b86efe1ef96bd12cc850

RESEARCH PRODUCT

Online Visualization of Corrosion Processes of Zinc and a Cu/Zn Galvanic Pair in Lithium Bromide Solutions

A. Igual-muñozJosé García-antónValentín Pérez-herranzJ. L. GuiñónJ. Pertusa-grau

subject

Lithium bromideGeneral Chemical EngineeringInorganic chemistrychemistry.chemical_elementGeneral ChemistryZincElectrochemistryElectrochemical cellCorrosionGalvanic corrosionchemistry.chemical_compoundchemistryElectrodeGalvanic cellGeneral Materials Science

description

Abstract A new method has been developed for online visualization of corrosion processes. The system allows surface images of the tested electrode to be captured simultaneously with the recorded electrochemical signal caused by corrosion processes without disturbing the electrochemical system. The experimental device consists of an electrochemical system with a horizontal electrochemical cell coupled to optical equipment. The horizontal position of the electrodes tested permitted the direct observation of surface modifications with time and of the experimental conditions by means of a triocular microscope stereoscope assembled to an image acquisition system. The new methodology was applied in the study of zinc corrosion and galvanic behavior when coupled to copper in lithium bromide (LiBr) media. Zinc exfoliation was observed in potentiodynamic tests. Zero-resistance ammetry was the electrochemical technique used to evaluate the galvanic corrosion in the Cu/Zn pair. The online visualization of the electro...

https://doi.org/10.5006/1.3277547