Abstract

This chapter reviews numerical modelling of magnesium (Mg) galvanic corrosion, in particular, the prediction of the galvanic current density distribution of a typical Mg alloy such as AZ91 in contact with steel in a typical corrosive solution such as 5% naCl. The galvanic current density distribution predicted by boundary elemental modelling was in good agreement with experimental measurements. The galvanic current density distribution caused by the interaction of two independent galvanic couples was equal to the sum of the galvanic current density caused by each individual galvanic couple. However, experimental measurements indicate that the measured corrosion rate was significantly higher than the galvanic corrosion rate, and this was interpreted as self-corrosion of Mg, corresponding to a penetration rate of ~230 mm/yr. However, does the necessity to postulate self-corrosion indicate some fundamental flaw in the methodology? Issues and future research directions are discussed.

Keywords: magnesium alloys, galvanic corrosion, boundary element method.

To get the full publication please Open the Publication Below

Open Here

Request Information

Follow Us!

Newsletter Sign-up

Areas of Interest

Please note that by submitting this form you are giving us permission to store the details you have entered above in our database system.  We will use this data to add you to our mailing list to receive the monthly BEASY e-newsletters you have selected. You can remove yourself from the e-newsletter mailing list at anytime by choosing the opt-out feature on the e-newsletter. We may also send you literature about BEASY via postal mailings and any other BEASY information and announcements which we think you will find of interest. We will not pass your details on to any 3rd party organisations.