Corrosion Resistance of ZnAlMg Alloys for Batch Hot Dip Galvanizing

Abstract:

In the paper the results of corrosion resistance tests on ZnAlMg alloys used as batch hot dip galvanizing baths are presented. The tests were carried out on ZnAl alloys with 7 wt.% Al with the addition of 3 wt.% and 6 wt.% Mg. Corrosion resistance of tested alloys was compared with corrosion resistance of the traditional zinc bath alloy. Corrosion resistance of the alloys was defined by comparative methods in two standard corrosion tests in neutral salt spray and in moist atmosphere containing SO₂. Electrochemical parameters of the corrosion process were determined on the basis of potentiodynamic tests. It was determined that the alloy of ZnAl7 has better corrosion resistance than the corrosion resistance of the alloy of a traditional zinc bath and that the addition of Mg to the alloy increases the corrosion resistance.

• Periodical: Solid State Phenomena (Volume 246)
• Pages: 99-104
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.246.99
• Online since: February 2016
• Authors: Mariola Saternus, Agnieszka Fornalczyk, Henryk Kania*, Jacek Mendala
• Keywords: Corrosion Resistance, Hot Dip Galvanizing, ZnAlMg Alloys

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