Correlation between the transient variation in positive/negative pulse voltages and the growth of PEO coating on 7075 aluminum alloy

doi:10.1016/j.electacta.2022.140056

IMR OpenIR

	Correlation between the transient variation in positive/negative pulse voltages and the growth of PEO coating on 7075 aluminum alloy
	Zhu, Mingyu 1,2; Song, Yingwei 1; Dong, Kaihui 1; Shan, Dayong 1; Han, En-Hou 1
通讯作者	Song, Yingwei(ywsong@imr.ac.cn)
	2022-04-10
发表期刊	ELECTROCHIMICA ACTA
ISSN	0013-4686
卷号	411 页码:11
摘要	A bipolar pulse mode is usually used in the plasma electrolytic oxidation (PEO) process of aluminum alloys. The negative pulse can eliminate the cavity and improve the compactness of the PEO coating. However, the effect mechanism of negative pulse on the electrical signal of PEO is not clearly understood. In this study, a method of improving the compactness of PEO coating and reduce energy consumption under different transient voltages and current waveforms is established and discussed. An equivalent circuit of RC series corresponding to the coating and the electric double layer during the PEO process was proposed to analyze the effect of negative pulse on the compactness of the PEO coating. Results showed that the voltage in the T+off stage can be rapidly reduced to less than the breakdown voltage by introducing negative pulses, and the discharge of unextinguished sparks on the sample surface was inhibited, resulting in a relatively compact PEO coating. The time constants RC decreases with increased negative currents. The decline of the time constant RC indicates the rapid response of the oxidation reaction to the electric signal, which can improve the coating's compactness and reduce the energy consumption. In actual production, the energy consumption can be reduced by setting up a reasonable ratio of positive and negative pulse voltages in the PEO.
关键词	Plasma electrolytic oxidation Transient variation Compactness Negative voltage Energy consumption
DOI	10.1016/j.electacta.2022.140056
收录类别	SCI
语种	英语
WOS研究方向	Electrochemistry
WOS类目	Electrochemistry
WOS记录号	WOS:000780698400002
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/172774
专题	中国科学院金属研究所
通讯作者	Song, Yingwei
作者单位	1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Mingyu,Song, Yingwei,Dong, Kaihui,et al. Correlation between the transient variation in positive/negative pulse voltages and the growth of PEO coating on 7075 aluminum alloy[J]. ELECTROCHIMICA ACTA,2022,411:11.
APA	Zhu, Mingyu,Song, Yingwei,Dong, Kaihui,Shan, Dayong,&Han, En-Hou.(2022).Correlation between the transient variation in positive/negative pulse voltages and the growth of PEO coating on 7075 aluminum alloy.ELECTROCHIMICA ACTA,411,11.
MLA	Zhu, Mingyu,et al."Correlation between the transient variation in positive/negative pulse voltages and the growth of PEO coating on 7075 aluminum alloy".ELECTROCHIMICA ACTA 411(2022):11.