Understanding Corrosion in Water Pipelines: A Guide for Pipeline Designers


Magnesium Nitrate

Last updated: April 10, 2019

What Does Magnesium Nitrate Mean?

Magnesium nitrate refers is a chemical compound with the molecular formula Mg(NO3)2 or MgN2O6. It is not naturally occurring and is in the form of a white crystalline solid. It is used to produce corrosion inhibitors.


Corrosionpedia Explains Magnesium Nitrate

Anti-corrosion technology involves the use of inhibitors, coatings and films to protect reactive metals and their alloys. Magnesium nitrate is an example of one such inhibitor that is used in this capacity.

Magnesium (II) nitrate (Mg(NO3)2) has corrosion inhibitor properties at a wide range of different concentrations (0.1% – 1.0 wt %). The coating system at various concentrations can be evaluated via electrochemical inspections unique to the substrate metal to be protected. Three main methods can be used to perform this examination:

  • Electrochemical impedance spectroscopy (EIS)
  • Potentiodynamic scanning (PDS)
  • Neutral salt spray (NSS) exposure

In addition, the surface morphology of the coating can be examined using the following methods:

  • Atomic force microscopy (AFM)
  • Scanning electron microscopy (SEM)

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