3.5% NaCl饱和Ca(OH)<sub>2</sub>溶液中醇胺缩聚物对碳钢腐蚀的抑制

引用本文: 周欣, 杨怀玉, 王福会. 3.5% NaCl饱和Ca(OH)₂溶液中醇胺缩聚物对碳钢腐蚀的抑制[J]. 物理化学学报, 2011, 27(03): 647-654. doi: 10.3866/PKU.WHXB20110315 shu

Citation: ZHOU Xin, YANG Huai-Yu, WANG Fu-Hui. Corrosion Inhibition by Sorbitol/Diethylenetriamine Condensation Product for Carbon Steel in 3.5% NaCl Saturated Ca(OH)₂ Solution[J]. Acta Physico-Chimica Sinica, 2011, 27(03): 647-654. doi: 10.3866/PKU.WHXB20110315 shu

3.5% NaCl饱和Ca(OH)₂溶液中醇胺缩聚物对碳钢腐蚀的抑制

基金项目:
国家科技支撑计划(2007BAB27B03)资助项目 (2007BAB27B03)

摘要:

利用动电位极化, 电化学阻抗谱(EIS)和表面形貌观察方法, 并结合量子化学计算, 在3.5% NaCl饱和Ca(OH)₂ 溶液中研究探讨了山梨醇与二乙烯三胺缩聚物(SDC)对碳钢腐蚀的抑制行为. 结果表明: SDC的加入可有效降低碳钢的腐蚀电流密度, 提高碳钢的点蚀电位, 表明阻绣剂对Cl^-诱导的局部腐蚀具有良好的抑制作用, 为混合型阻锈剂; 且在所研究浓度范围内, 随添加浓度增加, 缓蚀效率提高. 化合物对碳钢腐蚀的抑制主要源自阻锈剂分子在碳钢表面的静电吸附, 且吸附遵循Langmuir等温吸附规律.

关键词:

English

Corrosion Inhibition by Sorbitol/Diethylenetriamine Condensation Product for Carbon Steel in 3.5% NaCl Saturated Ca(OH)₂ Solution

1.
1State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China; 2Department of Metallurgic Engineering, Liaoning Institute of Science and Technology, Benxi 117022, Liaoning Province, P. R. China
Received Date: 21 September 2010
Available Online: 03 March 2011
Fund Project:
国家科技支撑计划(2007BAB27B03)资助项目

Abstract:

The inhibitive action of a sorbitol/diethylenetriamine condensation (SDC) product toward carbon steel corrosion in saturated Ca(OH)₂ solution containing 3.5% NaCl was investigated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), surface morphological observations, and quantum chemical calculations. The results indicate that the addition of SDC can effectively decrease the corrosion current densities of the carbon steel and increase the pitting corrosion potential suggesting that the local corrosion induced by Cl^- is strongly restricted by the inhibitor, which acts as a mixed type inhibitor. In the studied concentration range, the inhibition efficiency increased with an increase in inhibitor concentration. The overall inhibition behavior of SDC is attributed to the stabile adsorption film formd by the dominantly physical adsorption on the carbon steel surface according to the Langmuir adsorption isotherm.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

3.5% NaCl饱和Ca(OH)₂溶液中醇胺缩聚物对碳钢腐蚀的抑制

English

Corrosion Inhibition by Sorbitol/Diethylenetriamine Condensation Product for Carbon Steel in 3.5% NaCl Saturated Ca(OH)₂ Solution

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

3.5% NaCl饱和Ca(OH)2溶液中醇胺缩聚物对碳钢腐蚀的抑制

English

Corrosion Inhibition by Sorbitol/Diethylenetriamine Condensation Product for Carbon Steel in 3.5% NaCl Saturated Ca(OH)2 Solution

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

3.5% NaCl饱和Ca(OH)₂溶液中醇胺缩聚物对碳钢腐蚀的抑制

Corrosion Inhibition by Sorbitol/Diethylenetriamine Condensation Product for Carbon Steel in 3.5% NaCl Saturated Ca(OH)₂ Solution

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs