Understanding Corrosion in Water Pipelines: A Guide for Pipeline Designers



Last updated: November 19, 2018

What Does Magnetite Mean?

Magnetite (Fe3O4) refers to an ore of iron that occurs as a black isometric mineral of the spinel group. It is an important oxide of iron because it is highly polar and magnetic.


Corrosionpedia Explains Magnetite

Magnetite has a galvanic effect on carbon steel, particularly when it presents in a high temperature and high pressure environment. Industrial studies have shown that coupling magnetite to carbon steel caused galvanic corrosion on the steel.

These studies examined corrosion by oxygen. However, conclusive data has not been thoroughly examined to evaluate the galvanic coupling effect of magnetite and mild steel under carbon dioxide conditions and its corresponding corrosion rate.

The factors affecting the galvanic corrosion of carbon steel due to the coupling of magnetite include the cathode to anode surface area ratio and the effect of carbon dioxide partial pressures. The inhibition effects from a range of inhibitors and commercial inhibitors on galvanic corrosion have also been inconclusively investigated.


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