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Corrosion behaviour of magnesium sacrificial anodes in tap water
Author(s) -
Andrei M.,
di Gabriele F.,
Bonora P. L.,
Scantlebury D.
Publication year - 2003
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.200390010
Subject(s) - microstructure , materials science , anode , magnesium , intermetallic , scanning electron microscope , metallurgy , corrosion , electrochemistry , galvanic anode , cathodic protection , composite material , chemistry , electrode , alloy
The effects of applied current, testing time and microstructure on the electrochemical properties of magnesium‐based sacrificial anodes in potable water were evaluated. Galvanostatic tests, potentiodynamic polarisation and scanning electron microscopy (SEM) analyses were used to determine anode efficiency, corrosion rate and microstructures of the Mg‐anodes under study. The contribution of processes as mechanical material loss and hydrogen evolution on the current wastage was investigated. The effect of the different microstructures like those obtained by heat treatments to reduce the intermetallic phase was also tested.