Cassava starch graft copolymer as a novel inhibitor for the corrosion of aluminium in HNO3 solution
Cassava starch graft copolymer as a novel inhibitor for the corrosion of aluminium in HNO3 solution
复制标题
木薯淀粉接枝共聚物作为 HNO3 溶液中铝腐蚀的新型抑制剂
DOI：
10.1016/j.molliq.2019.03.044
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发表时间：
2019-05
影响因子：
6
通讯作者：
Xiaoguang Xie
中科院分区：
文献类型：
--
作者：
Xianghong Li;Shuduan Deng;Tong Lin;Xiaoguang Xie
将丙烯酰胺(AA)接枝到木薯淀粉(CS)上，制备了木薯淀粉接枝共聚物(CsgC)。采用失重法、电化学技术、扫描电子显微镜(SEM)、原子力显微镜(AFM)、接触角图像和X射线光电子能谱(XPS)等方法研究了CsgC对铝在硝酸溶液中的缓蚀作用。通过量子化学计算和分子动力学模拟，对吸附机理进行了理论研究。CsgC是一种有效的新型缓蚀剂，具有比CS或AA更高的缓蚀效率。CsgC在铝表面的吸附符合朗缪尔吸附等温式。CsgC是一种混合型缓蚀剂，主要起缓阳极腐蚀作用。EIS由高频大电容回路、中频小感电容回路和低频电容回路组成，阻抗随CsgC浓度的增加而增强。扫描电子显微镜和原子力显微镜证实，在介质中加入CsgC后，铝表面的腐蚀得到明显的延缓。接触角图像表明，被抑制的铝表面具有疏水性。XPS提供了CsgC在铝表面吸附的证据。量子化学计算和分子动力学模拟可以很好地从理论上解释CsgC比CS具有更强的吸附和缓蚀能力。
Cassava starch graft copolymer (CSGC) was prepared by grafting acryl amide (AA) onto cassava starch (CS). The inhibition effect of CSGC on the corrosion of aluminium in HNO3solution was studied by weight loss, electrochemical techniques, scanning electron microscope (SEM), atomic force microscope (AFM), contact angle images and X-ray photoelectron spectroscopy (XPS). Quantum chemical calculation and molecular dynamic simulation were performed to theoretically investigate the adsorption mechanism. CSGC is an effective novel inhibitor, and shows higher inhibition efficiency than either CS or AA. The adsorption of CSGC on aluminium surface obeys Langmuir isotherm. CSGC is a mixed-type inhibitor, while mainly retards the anodic corrosion. EIS consists of a large capacitive loop at high frequencies followed by a small inductive one at middle frequencies and the second capacitive loop at low frequency values, and the impedance strengthens with the concentration of CSGC. SEM and AFM confirms the corrosion of aluminium surface is prominently retarded after adding CSGC to the media. Contact angle image suggests that the inhibited aluminium surface is of hydrophobic nature. XPS provides the evidence of the adsorptive inhibitor of CSGC on aluminium surface. Quantum chemical calculation and molecular dynamic simulation can be well theoretically elucidate that CSGC shows higher adsorption and inhibition ability than CS.
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DOI：
10.1080/00222338608063408
发表时间：
1986-04
期刊：
Journal of Macromolecular Science, Part A
影响因子：
--
作者：
H. Pledger;T. Young;G.–S. Wu;G. Butler;T. Hogen-esch
通讯作者：
H. Pledger;T. Young;G.–S. Wu;G. Butler;T. Hogen-esch
影响因子：
2.7
作者：
Xianghong Li;S. Deng
通讯作者：
Xianghong Li;S. Deng
影响因子：
2.3
作者：
W. Aichholzer;H. Fritz
通讯作者：
W. Aichholzer;H. Fritz
影响因子：
4.6
作者：
Labjar, Najoua;Lebrini, Mounim;Jama, Charafeddine
通讯作者：
Jama, Charafeddine
影响因子：
3
作者：
J. Fang;P. Fowler;C. Hill
通讯作者：
J. Fang;P. Fowler;C. Hill