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

doi:10.1002/maco.202213397

CORC > 金属研究所 > 中国科学院金属研究所

	An investigation on the mechanisms of ant nest corrosion of copper tube in formic acid environment
	Li, Haihong 3; Liu, Xiao 2; Li, Deshan 3; Wang, Zhongqi 3; Zhang, Xintao 2; Wang, Songwei 1
刊名	MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
	2022-08-30
页码	7
关键词	ant nest corrosion copper tube formic acid mechanisms oxide layer
ISSN号	0947-5117
DOI	10.1002/maco.202213397
通讯作者	Li, Haihong(hhli@ytu.edu.cn)
英文摘要	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.
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
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000847524700001
资助机构	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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/175013]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, Haihong
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang, Peoples R China 2.Yantai Univ, Sch Environm & Mat Engn, Yantai, Peoples R China 3.Yantai Univ, Coll Nucl Equipment & Nucl Engn, Yantai 264005, 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.