The Corrosion Mechanism of Zn-5%Al-0.3%Mg Coating

Bo Gao; Shi Wei Li; Yi Hao; Gan Feng Tu; Liang Hu; Shao Hua Yin

doi:10.4028/www.scientific.net/AMR.189-193.1284

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 189-193The Corrosion Mechanism of Zn-5%Al-0.3%Mg Coating

The Corrosion Mechanism of Zn-5%Al-0.3%Mg Coating

Abstract:

A new hot dip Zn-5%Al-0.3%Mg alloy coating was performed on cold rolled common steel. The hot-dip process was executed by self-made hot dip galvanising simulator (China patent, No.201010160353). The corrosion resistance of alloy-coated steels was detected by neutral salt spray test . SEM and EDS test results demonstrate that Mg is mainly distributed in the crystal boundary. XRD test results shows corrosion product of Zn-5%Al-0.3%Mg alloy coating is mainly Zn₅(OH)₈Cl₂•H₂O. The characteristic of Zn₅ (OH)₈Cl₂•H₂O is dense and insoluble, so it is protective. In order to study the anticorrosion mechanism, all the tests of the Zn-5%Al-0.3%Mg alloy were carried out with Zn-5%Al coating together.

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Periodical:

Advanced Materials Research (Volumes 189-193)

Pages:

1284-1287

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.189-193.1284

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Online since:

February 2011

Authors:

Bo Gao, Shi Wei Li, Yi Hao, Gan Feng Tu, Liang Hu, Shao Hua Yin

Keywords:

Corrosion Mechanism, Hot-Dip, Neutral Salt Spray Test, Zn-5%Al-0.3%Mg Alloy Coating

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