A novel procedure for anodic reaction quantitative restructuration and its application in pure magnesium

Abstract

The anodic dissolution behavior of pure magnesium in sodium chloride solution was characterized using a synchronous online monitoring system. Concurrently, the film-forming magnesium was quantitatively characterized using a Thermal Gravimetric Analyzer (TGA). By combining these two analyses, the anodic reaction during the process of anodic polarization of magnesium was comprehensively described for the first time. This novel procedure allows for detailed examination of the quantitative relationship between film-forming magnesium and dissolved magnesium. To elucidate the anomalous hydrogen evolution, a plausible local active site mechanism was proposed. This mechanism suggests that uneven current distribution causes the local active dissolution, creating a potential difference that leads to the formation of micro-galvanic couples and subsequently anomalous hydrogen evolution.