Development of Sacrificial Anode from Al, Mg, and Ti from Iron Ore Tailings
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Date
2024-03-07
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Taylor & Francis Group
Abstract
This investigation used aluminium, magnesium, iron ore tailings, and low-carbon steel. Iron ore
tailings (5–30 wt% Mg and 50 μm in size) in an aluminium matrix formed the anode. In 0.5 M
NaCl solution, the weight loss, corrosion rate, and electrochemical properties were measured.
Samples A to E have corrosion rates of 0.43, 0.28, 0.36, 0.08, and 0.11 mm/yr, respectively. SEM/
EDS examination revealed the presence of elemental Al, Mg, O, and Si in the anode. The XRD
patterns indicate intermetallic compounds such as iron nitride (Fe3N), aluminium silver (Ag-Al),
and manganese zirconium (Mn2Zr). In samples A, B, and C, Al and Mg formed a protective
coating on the anode, while C and Si reduced passivation and released electrons to protect the
steel. IOTs and Mg in the aluminium matrix improve the anodic corrosion resistance. The
observed improvements in corrosion resistance highlight the potential of these sacrificial
anodes for practical applications in corrosion protection systems