干旱区生态环境知识资源中心(Arid): Aqueous Dried Extract of Skytanthus acutus Meyen as Corrosion Inhibitor of Carbon Steel in Neutral Chloride Solutions

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DOI	10.3390/met11121992
	Aqueous Dried Extract of Skytanthus acutus Meyen as Corrosion Inhibitor of Carbon Steel in Neutral Chloride Solutions
	Caceres, Luis; Frez, Yohana; Galleguillos, Felipe; Soliz, Alvaro; Gomez-Silva, Benito; Borquez, Jorge
通讯作者	Caceres, L (corresponding author)，Univ Antofagasta, Dept Ingn Quim & Proc Minerales, Antofagasta 1240000, Chile.
来源期刊	METALS
EISSN	2075-4701
出版年	2021
卷号	11 期号:12
英文摘要	The implementation of corrosion engineering control methods and techniques is crucial to extend the life of urban and industrial infrastructure assets and industrial equipment affected by natural corrosion. Then, the search of stable and environmentally friendly corrosion inhibitors is an important pending task. Here, we provide experimental evidence on the corrosion inhibitory activity of aqueous extracts of Skytanthus acutus Meyen leaf, a native plant from the Atacama Desert in northern Chile. Skytanthus extracts as a powder should be prepared at 55 degrees C to avoid thermal decomposition and loss of corrosion inhibitory activity. Corrosion of carbon steel AISI1020 immersed in 0.5 M NaCl was evaluated in the presence of different doses of Skytanthus extract by complementary and simultaneous linear polarization, electrochemical impedance spectroscopy, and weight-loss technique under high hydrodynamic conditions. Mixed Potential Theory was applied to confirm the electrochemical activity of the extract inhibitory capabilities. The Skytanthus extracts reached a 90% corrosion inhibitory efficiency when tested at 100 to 1200 ppm in a time span of 48 h, through an electrochemical interaction between the extract inhibitor component and the carbon steel surface. The corrosion inhibition activity observed in Skytanthus dry extracts involves a protective film formation by a mechanism that includes an iron dissolution at the expense of either oxygen reduction and/or hydrogen evolution, followed by a ferrous-ferric iron cycling, the formation of an iron complex and adsorption to the metal surface, and, finally, desorption or degradation of the protecting film. The water-soluble plant extract was subjected to HPLC-MS analyses that rendered 14 major signals, with quinic acid, protocatechuic acid, chlorogenic acid isomers, vanillic acid hexoside, and patuletin 3-methoxy-7-glucoside as the most abundant components. Then, we propose that a phenolic derivative is responsible for the corrosion inhibitory activity found in Skytanthus extracts.
英文关键词	Skytanthus acutus Meyen carbon steel EIS weight loss corrosion inhibition inhibition mechanism
类型	Article
语种	英语
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000736287600001
WOS关键词	MILD-STEEL ; DISSOLVED-OXYGEN ; 3.5-PERCENT NACL ; PHENOLIC-ACIDS ; IRON ; KINETICS ; COMPLEXATION ; IRON(III) ; MEDIA ; MECHANISMS
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/375807
作者单位	[Caceres, Luis; Frez, Yohana; Galleguillos, Felipe] Univ Antofagasta, Dept Ingn Quim & Proc Minerales, Antofagasta 1240000, Chile; [Soliz, Alvaro] Univ Atacama, Dept Ingn Met, Copiapo 1530000, Chile; [Gomez-Silva, Benito] Univ Antofagasta, Fac Ciencias Salud, Dept Biomed, Lab Bioquim, Antofagasta 12701300, Chile; [Gomez-Silva, Benito] Univ Antofagasta, Ctr Biotechnol & Bioengn CeBiB, Antofagasta 12701300, Chile; [Borquez, Jorge] Univ Antofagasta, Dept Quim, Antofagasta 1240000, Chile
推荐引用方式 GB/T 7714	Caceres, Luis,Frez, Yohana,Galleguillos, Felipe,et al. Aqueous Dried Extract of Skytanthus acutus Meyen as Corrosion Inhibitor of Carbon Steel in Neutral Chloride Solutions[J],2021,11(12).
APA	Caceres, Luis,Frez, Yohana,Galleguillos, Felipe,Soliz, Alvaro,Gomez-Silva, Benito,&Borquez, Jorge.(2021).Aqueous Dried Extract of Skytanthus acutus Meyen as Corrosion Inhibitor of Carbon Steel in Neutral Chloride Solutions.METALS,11(12).
MLA	Caceres, Luis,et al."Aqueous Dried Extract of Skytanthus acutus Meyen as Corrosion Inhibitor of Carbon Steel in Neutral Chloride Solutions".METALS 11.12(2021).