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

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Shikha Mishra; N.P. Singh; Dr. Sanjay Kumar Singh

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

Authors: Shikha Mishra, N.P. Singh, Dr. Sanjay Kumar Singh

Unique Paper ID: 173968
Volume: 11
Issue: 10
PageNo: 2480-2492

Keywords: Corrosion aluminium

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.

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ISSN: 2349-6002
Volume: 11
Issue: 10
PageNo: 2480-2492

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

Available:https://ijirt.org/article?manuscript=173968

17 Feb, 2025

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