Codeposited Zn-Mg coating with improved mechanical and anticorrosion properties

Caizhen Yao; Weiwei Chen; Wei Gao

doi:10.1016/j.surfcoat.2013.01.015

Codeposited Zn-Mg coating with improved mechanical and anticorrosion properties

Caizhen Yao^*, Weiwei Chen, Wei Gao

^*Corresponding author for this work

The University of Auckland

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

A Zn-Mg coating was prepared by magnetron co-sputtering method on carbon steel with Zn layer pre-deposited using an alkaline non-cyanide zinc bath. The morphologies, chemical compositions, mechanical properties and anticorrosion properties of specimens were investigated. The microhardness of the Zn-Mg coating increased from 244HV₂₅ of the electroplated Zn coating to 323HV₂₅. The electrochemical test in NaCl solution showed that the Zn-Mg coating had a passive region around the potential of 300mV. Salt water immersion test in 3.5wt.% NaCl solution also showed corrosion property improvement. The red rust generation time of Zn-Mg coating was doubled compared with the Zn coating. The possible mechanism of the improvement of corrosion resistance of Zn-Mg coating is proposed.

Original language	English
Pages (from-to)	126-130
Number of pages	5
Journal	Surface and Coatings Technology
Volume	219
DOIs	https://doi.org/10.1016/j.surfcoat.2013.01.015
Publication status	Published - 25 Mar 2013
Externally published	Yes

Keywords

Co-sputtering
Corrosion resistance
Electrochemical
Zn-Mg coating

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10.1016/j.surfcoat.2013.01.015

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abstract = "A Zn-Mg coating was prepared by magnetron co-sputtering method on carbon steel with Zn layer pre-deposited using an alkaline non-cyanide zinc bath. The morphologies, chemical compositions, mechanical properties and anticorrosion properties of specimens were investigated. The microhardness of the Zn-Mg coating increased from 244HV25 of the electroplated Zn coating to 323HV25. The electrochemical test in NaCl solution showed that the Zn-Mg coating had a passive region around the potential of 300mV. Salt water immersion test in 3.5wt.% NaCl solution also showed corrosion property improvement. The red rust generation time of Zn-Mg coating was doubled compared with the Zn coating. The possible mechanism of the improvement of corrosion resistance of Zn-Mg coating is proposed.",

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T1 - Codeposited Zn-Mg coating with improved mechanical and anticorrosion properties

AU - Yao, Caizhen

AU - Chen, Weiwei

AU - Gao, Wei

PY - 2013/3/25

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N2 - A Zn-Mg coating was prepared by magnetron co-sputtering method on carbon steel with Zn layer pre-deposited using an alkaline non-cyanide zinc bath. The morphologies, chemical compositions, mechanical properties and anticorrosion properties of specimens were investigated. The microhardness of the Zn-Mg coating increased from 244HV25 of the electroplated Zn coating to 323HV25. The electrochemical test in NaCl solution showed that the Zn-Mg coating had a passive region around the potential of 300mV. Salt water immersion test in 3.5wt.% NaCl solution also showed corrosion property improvement. The red rust generation time of Zn-Mg coating was doubled compared with the Zn coating. The possible mechanism of the improvement of corrosion resistance of Zn-Mg coating is proposed.

AB - A Zn-Mg coating was prepared by magnetron co-sputtering method on carbon steel with Zn layer pre-deposited using an alkaline non-cyanide zinc bath. The morphologies, chemical compositions, mechanical properties and anticorrosion properties of specimens were investigated. The microhardness of the Zn-Mg coating increased from 244HV25 of the electroplated Zn coating to 323HV25. The electrochemical test in NaCl solution showed that the Zn-Mg coating had a passive region around the potential of 300mV. Salt water immersion test in 3.5wt.% NaCl solution also showed corrosion property improvement. The red rust generation time of Zn-Mg coating was doubled compared with the Zn coating. The possible mechanism of the improvement of corrosion resistance of Zn-Mg coating is proposed.

KW - Co-sputtering

KW - Corrosion resistance

KW - Electrochemical

KW - Zn-Mg coating

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VL - 219

SP - 126

EP - 130

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

ER -

Codeposited Zn-Mg coating with improved mechanical and anticorrosion properties

Abstract

Keywords

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