The effect of magneticfield on biomineralization and corrosion behavior of carbon steel induced by iron-oxidizing bacteria

• Magneticfield inhibits the growth of iron-oxidizing bacteria.
• Magneticfield inhibits pitting and uniform corrosion.
• Magneticfield promotes the formation of a more compact biomineral iron film.
• Magneticfield alters the morphology of biomineralized iron minerals.
• Iron-oxidizing bacteria contribute to iron mineralization.

In this paper, the effect of a magneticfield (MF) on biomineralization and corrosion behavior of Q235 carbon steel were studied using surface analysis, weight loss and electrochemical measurements. Experimental results showed that MF inhibited the growth of iron-oxidizing bacteria (IOB) and the corrosion of Q235 carbon steel. MF reduced the largest pit depth by half, while it reduced pit population density from 50 pits cm−2 to 10 pits cm−2. MF also altered the morphology of biomineralization film, leading to the formation of a more compact biomineralization film which contributed to the lower corrosion rate.

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