An investigation on the mechanisms of ant nest corrosion of copper tube in formic acid environment

doi:10.1002/maco.202213397

IMR OpenIR

	An investigation on the mechanisms of ant nest corrosion of copper tube in formic acid environment
	Li, Haihong 1; Liu, Xiao 2; Li, Deshan 1; Wang, Zhongqi 1; Zhang, Xintao 2; Wang, Songwei 3
通讯作者	Li, Haihong(hhli@ytu.edu.cn)
	2022-08-30
发表期刊	MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
ISSN	0947-5117
页码	7
摘要	Copper tubes used in air-conditioners and refrigerators often fail due to ant nest corrosion (ANC) in formic acid environment. In this paper, corrosion behavior and corrosion mechanisms of copper tubes in formic acid (HCOOH) were analyzed by vapor corrosion tests, optical microscopy (OM), scanning electron microscope (SEM), energy-dispersive X-ray spectrometry (EDS). The effects of the surface condition on ANC of copper tube were also investigated. Results showed that ANC of copper tube was a spontaneous process. The surface integrity of copper tube surface oxide layer is not the decisive factor of ANC. ANC originated from the dissolution of the surface oxide layer in HCOOH, which exposed fresh copper matrix. ANC is a special electrochemical corrosion, where the copper matrix acts as an anode and the undissolved surface oxide layer acts as a cathode due to the potential difference. The accumulation of corrosion products consisting of Cu(HCOO)(2) and Cu2O can produce a wedge effect and generate many microcracks until to penetrate the copper tube wall. These findings would provide a deep understanding of the corrosion behavior of copper and copper alloys.
关键词	ant nest corrosion copper tube formic acid mechanisms oxide layer
资助者	Doctoral Fund of Yantai University ; Natural Science Foundation of Shandong Province, China ; Project of Shandong Province Higher Educational Science and Technology Program ; Graduate Innovation Foundation of Yantai University, GIFYTU
DOI	10.1002/maco.202213397
收录类别	SCI
语种	英语
资助项目	Doctoral Fund of Yantai University[HJ16B01] ; Natural Science Foundation of Shandong Province, China[ZR2018MEE005] ; Project of Shandong Province Higher Educational Science and Technology Program[J18KA059] ; Graduate Innovation Foundation of Yantai University, GIFYTU[YDYB2134] ; Graduate Innovation Foundation of Yantai University, GIFYTU[KGIFYTU2236]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000847524700001
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：1[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/321006/175014
专题	中国科学院金属研究所
通讯作者	Li, Haihong
作者单位	1.Yantai Univ, Coll Nucl Equipment & Nucl Engn, Yantai 264005, Peoples R China 2.Yantai Univ, Sch Environm & Mat Engn, Yantai, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Li, Haihong,Liu, Xiao,Li, Deshan,et al. An investigation on the mechanisms of ant nest corrosion of copper tube in formic acid environment[J]. MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION,2022:7.
APA	Li, Haihong,Liu, Xiao,Li, Deshan,Wang, Zhongqi,Zhang, Xintao,&Wang, Songwei.(2022).An investigation on the mechanisms of ant nest corrosion of copper tube in formic acid environment.MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION,7.
MLA	Li, Haihong,et al."An investigation on the mechanisms of ant nest corrosion of copper tube in formic acid environment".MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION (2022):7.