Mesoscopic transformation at initial corrosion stage of 20# steel in aqueous solution under gas-liquid two-phase stratified flow condition

doi:10.1108/ACMM-02-2020-2257

	Mesoscopic transformation at initial corrosion stage of 20# steel in aqueous solution under gas-liquid two-phase stratified flow condition
	Yang, Guirong 1; Pan, Zhaoxia 1; Zhang, Zhenghai 1; Song, Wenming 2; Ma, Ying 1; Hao, Yuan 1
刊名	ANTI-CORROSION METHODS AND MATERIALS
	2021
卷号	68 期号:2 页码:53-63
关键词	CO2 corrosion Stratified flow Corrosion product layer growth model Densification process
ISSN号	0003-5599
DOI	10.1108/ACMM-02-2020-2257
英文摘要	Purpose This study aims to investigate the initial corrosion behavior in aqueous solution of 20# seamless steel under (CO2/aqueous solution) gas-liquid two-phase stratified flow conditions. Design/methodology/approach The initial corrosion behavior was studied through the weight loss methods, scanning electron microscopy with energy-dispersive x-ray spectroscopy and x-ray diffraction. Findings The corrosion rate of 20# steel obviously increases with the increasing gas pressure at different corrosion time when the CO2 pressure is less than 0.11 MPa, and the increase of corrosion rate tends to be steady when the pressure exceeds 0.11 MPa. With the increase of CO2 pressure, the corrosion products changed from flocculent to acicular, granular and scaly. A four-stage model for the growth of the corrosion product layer was proposed, namely, the diffusion reaction stage, the local film formation stage, the complete film formation stage and the densification stage of the product film. Originality/value A four-stage model for the growth of the corrosion product layer on the pipe wall surface under this condition was proposed, namely, the diffusion reaction stage, the local film formation stage, the complete film formation stage and the densification stage of the product film. The growing process and densification mechanism of corrosion products layer were discussed.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	EMERALD GROUP PUBLISHING LTD
WOS记录号	WOS:000634607100001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148290]
专题	材料科学与工程学院
作者单位	1.Lanzhou Univ Technol, Lanzhou, Peoples R China; 2.Lanpec Technol Ltd, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Yang, Guirong,Pan, Zhaoxia,Zhang, Zhenghai,et al. Mesoscopic transformation at initial corrosion stage of 20# steel in aqueous solution under gas-liquid two-phase stratified flow condition[J]. ANTI-CORROSION METHODS AND MATERIALS,2021,68(2):53-63.
APA	Yang, Guirong,Pan, Zhaoxia,Zhang, Zhenghai,Song, Wenming,Ma, Ying,&Hao, Yuan.(2021).Mesoscopic transformation at initial corrosion stage of 20# steel in aqueous solution under gas-liquid two-phase stratified flow condition.ANTI-CORROSION METHODS AND MATERIALS,68(2),53-63.
MLA	Yang, Guirong,et al."Mesoscopic transformation at initial corrosion stage of 20# steel in aqueous solution under gas-liquid two-phase stratified flow condition".ANTI-CORROSION METHODS AND MATERIALS 68.2(2021):53-63.