A comprehensive analysis of galvanic corrosion in magnesium alloy AZ91D when it comes into contact with aluminium alloy, steel, and zinc.

  • Unique Paper ID: 173968
  • Volume: 11
  • Issue: 10
  • PageNo: 2480-2492
  • Abstract:
  • An investigation was carried out into the galvanic corrosion of magnesium alloy AZ91D in contact with zinc, aluminium alloy A380 and 4150 steel. Specially designed test panels were used to measure galvanic currents under salt spray conditions. It was found that the distributions of the galvanic current densities on AZ91D and on the cathodes were different. An insulating spacer between the AZ91D anode and the cathodes could not eliminate galvanic corrosion. Steel was the worst cathode and aluminium the least aggressive to AZ91D. Corrosion products from the anode and cathodes appeared to be able to affect the galvanic corrosion process through an ‘alkalisation’, ‘passivation’, ‘poisoning’ effect or ‘shortcut’ effect.

Copyright & License

Copyright © 2025 Authors retain the copyright of this article. This article is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

BibTeX

@article{173968,
        author = {Shikha Mishra and N.P. Singh and Dr. Sanjay Kumar Singh},
        title = {A comprehensive analysis of galvanic corrosion in magnesium alloy AZ91D when it comes into contact with aluminium alloy, steel, and zinc.},
        journal = {International Journal of Innovative Research in Technology},
        year = {2025},
        volume = {11},
        number = {10},
        pages = {2480-2492},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=173968},
        abstract = {An investigation was carried out into the galvanic corrosion of magnesium alloy AZ91D in contact with zinc, aluminium alloy A380 and 4150 steel. Specially designed test panels were used to measure galvanic currents under salt spray conditions. It was found that the distributions of the galvanic current densities on AZ91D and on the cathodes were different. An insulating spacer between the AZ91D anode and the cathodes could not eliminate galvanic corrosion. Steel was the worst cathode and aluminium the least aggressive to AZ91D. Corrosion products from the anode and cathodes appeared to be able to affect the galvanic corrosion process through an ‘alkalisation’, ‘passivation’, ‘poisoning’ effect or ‘shortcut’ effect.},
        keywords = {Corrosion, aluminium},
        month = {March},
        }

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