ChemInform Abstract: INVESTIGATIONS OF THE HYDROGEN EVOLUTION KINETICS AND HYDROGEN ABSORPTION BY IRON ELECTRODES DURING CATHODIC POLARIZATION

Abstract

Die Kinetik der elektrochemischen Reduktion von H‐Ionen oder H2O‐Molekülen an Fe‐Elektroden wird mit Hilfe der Elektropermeationsmethode untersucht.

Reducing the corrosion rate of magnesium via microalloying additions of group 14 and 15 elements

“…has been dramatically affected by the presence of electro-catalytic poisons such as arsenic, antimony, bismuth and tin[40,41,[87][88][89][90][91]. The adsorption of the cathodic poisons upon electrode surface reduced the surface coverage of hydrogen atom intermediate and restricted the recombination absorbed hydrogen atom intermediate, thus retarding the rate of HER[88,90,[92][93][94].It is, therefore, reasonably hypothesised that, the alloying elements used in this work might achieve similar poisoning effect in Mg, whereby deactivated the enriched Fe or Fe containing phase towards HER and suppressed cathodic activation.Nevertheless, Lysne, et al, proposed a model to estimate the Fe enrichment following anodic polarisation based on Mg samples containing a different range of Fe concentration (ranging from 25ppmw to 13000 ppmw)[95]. It was revealed that the efficiency of Fe enrichment following anodic dissolution was estimated to be low (less than 1%).…”