ScholarLens Back to search
2018•Surface and Interface AnalysisRequires access

Growth behaviour of cerium‐based conversion coating on Zn‐5%Al alloy

Ziwen Sun, Gang Kong, Chunshan Che, Yanqi Wang, Xinrui Miao

Open publisher page 9 citations

Abstract

Cerium‐based conversion coatings were deposited on a Zn‐5%Al alloy by immersing the alloy in cerium nitrate aqueous solutions with various immersion times. The growth behaviour of the cerium‐based conversion coating on the Zn‐5%Al alloy was investigated by the electrochemical impedance spectroscopy (EIS), SEM, energy dispersive spectroscopy (EDS), and XPS techniques. The results reveal that the coating mainly consists of ZnO, Zn(OH) 2 , Ce(OH) 4 , Ce(OH) 3 , CeO 2 , and Ce 2 O 3 . The growth of the cerium‐based conversion coating is accompanied by metal dissolution. The dissolution mainly occurs on the η‐Zn surface of the phase boundary and continues to extend to the Zn‐rich phase as the coating grows. EIS results show that with increasing immersion time, the corrosion resistance of the Ce conversion coating gradually increases in the early growth stage and then decreases when the cracks appear.

About this research paper

What this paper is about

Cerium‐based conversion coatings were deposited on a Zn‐5%Al alloy by immersing the alloy in cerium nitrate aqueous solutions with various immersion times. The growth behaviour of the cerium‐based conversion coating on the Zn‐5%Al alloy was investigated by the electrochemical impedance spectroscopy (EIS), SEM, energy dispersive spectroscopy (EDS), and XPS techniques. The results reveal that the coating mainly consists of ZnO, Zn(OH) 2 , Ce(OH) 4 , Ce(OH) 3 , CeO 2 , and Ce 2 O 3 . The growth of the cerium‐based conversion coating is accompanied by metal dissolution. The dissolution mainly occurs on the η‐Zn surface of the phase boundary and continues to extend to the Zn‐rich phase as the coating grows. EIS results show that with increasing immersion time, the corrosion resistance of the Ce conversion coating gradually increases in the early growth stage and then decreases when the cracks appear.

Why it matters

OpenAlex reports 9 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Cerium‐based conversion coatings were deposited on a Zn‐5%Al alloy by immersing the alloy in cerium nitrate aqueous solutions with various immersion times. The growth behaviour of the cerium‐based conversion coating on the Zn‐5%Al alloy was investigated by the electrochemical impedance spectroscopy (EIS), SEM, energy dispersive spectroscopy (EDS), and XPS techniques. The results reveal that the coating mainly consists of ZnO, Zn(OH) 2 , Ce(OH) 4 , Ce(OH) 3 , CeO 2 , and Ce 2 O 3 . The growth of the cerium‐based conversion coating is accompanied by metal dissolution. The dissolution mainly occurs on the η‐Zn surface of the phase boundary and continues to extend to the Zn‐rich phase as the coating grows. EIS results show that with increasing immersion time, the corrosion resistance of the Ce conversion coating gradually increases in the early growth stage and then decreases when the cracks appear.

Key concepts: Cerium, Cerium nitrate, Conversion coating, Alloy, Materials science, Coating, Dissolution, Dielectric spectroscopy

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
Growth behaviour of cerium‐based conversion coating on Zn‐5%Al alloy — Research Paper | ScholarLens