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化学工业与工程 2022, Vol. 39 Issue (2) :100-107    DOI: 10.13353/j.issn.1004.9533.20210307
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Starch-AA-CS三元共聚物对酸溶液中碳钢的缓蚀作用
侯道林, 杨武魁, 董社英
西安建筑科技大学化学与化工学院, 西安 710311
Corrosion inhibition of carbon steel in acid solution by starch-AA-CS terpolymer
HOU Daolin, YANG Wukui, DONG Sheying
College of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an 710311, China

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摘要 以淀粉(Starch)、丙烯酸(AA)和壳聚糖(CS)为原料合成三元共聚物(SAAC)。利用红外光谱(FT-IR)和X射线衍射(XRD)进行结构表征,并通过电化学方法、失量法、扫描电子显微镜(SEM)和能谱仪(EDS)研究SAAC在1 mol·L-1 HCl环境下对Q235碳钢的缓蚀作用及机理。结果显示,SAAC是一种混合型缓蚀剂,30℃时,200 mg·L-1的SAAC的缓蚀率可达90.1%。通过Gibbs自由能和Tafel曲线可知,SAAC在Q235碳钢表面的吸附符合Langmuir吸附等温式,同时存在物理吸附与化学吸附。SAAC合成原料经济、环保,合成条件温和,是一种具有广泛应用前景的绿色环保型缓蚀剂。
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侯道林
杨武魁
董社英
关键词三元聚合物   缓蚀剂   碳钢   极化曲线   阻抗谱图     
Abstract: The copolymer SAAC was synthesized by starch, acrylic acid (AA) and chitosan (CS) as raw materials, and it was characterized by IR spectroscopy and X-ray diffraction. The corrosion inhibition and mechanism of SAAC on Q235 carbon steel under 1 mol·L-1 HCl were studied by electrochemical method, weight loss method, scanning electron microscope and energy spectrometer. The results showed that the corrosion inhibition rate of SAAC at 200 mg·L-1 could reach 90.1% at 30℃,which is a mixed corrosion inhibitor. According to Tafel curve and Gibbs free energy, the adsorption of SAAC on Q235 carbon steel followed the Langmuir adsorption isotherm, which is a physical and chemical co-adsorption. Therefore, SAAC is a kind of environmental protection corrosion inhibitor with wide application prospects.
Keywordsterpolymer;   corrosion inhibitor;   carbon steel;   polarization curve;   impedance spectra     
Received 2021-03-24;
Fund:陕西省重点研发计划一般项目-工业领域(2020GY-306)和国家自然科学基金项目(21575111)。
Corresponding Authors: 董社英,教授,E-mail:dongsyy-006@163.com。     Email: dongsyy-006@163.com
About author: 侯道林(1995-),男,硕士研究生,现从事金属腐蚀方面的研究。
引用本文:   
侯道林, 杨武魁, 董社英.Starch-AA-CS三元共聚物对酸溶液中碳钢的缓蚀作用[J].  化学工业与工程, 2022,39(2): 100-107
HOU Daolin, YANG Wukui, DONG Sheying.Corrosion inhibition of carbon steel in acid solution by starch-AA-CS terpolymer[J].  Chemcial Industry and Engineering, 2022,39(2): 100-107
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