新型含长链烷基苯并三唑缓蚀剂的制备与性能研究

doi:10.11902/1005.4537.2015.214

中国腐蚀与防护学报

2016, Vol. 36

Issue (5): 415-420 DOI: 10.11902/1005.4537.2015.214

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新型含长链烷基苯并三唑缓蚀剂的制备与性能研究

左翔^1,²(

),蒋裕丰¹,迟挺¹,胡鑫¹,曹冬梅¹,蔡烽²

1. 水资源高效利用与工程安全国家工程研究中心南京 210019
2. 南京工业大学材料科学与工程学院南京 210009

Synthesis and Performance of New Benzotriazole Derivatives with Long Alkyl Chain as Corrosion Inhibitors

Xiang ZUO^1,²(

),Yufeng JIANG¹,Ting CHI¹,Xin HU¹,Dongmei CAO¹,Feng CAI²

1. National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Nanjing 210019, China
2. College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China

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摘要:

以4种不同碳链长度的烷基硫醇、氯乙酸钠和苯并三唑为原料,合成了一系列新型的1-(2'-烷硫基乙酰基)-苯并三唑缓蚀剂。采用失重法和电化学方法评价了这4种苯并三唑衍生物对Cu在3.5%(质量分数)NaCl溶液中的缓蚀性能,同时对缓蚀剂分子在Cu表面的吸附规律进行了初步的研究。结果表明,该系列苯并三唑衍生物是一类以阳极抑制为主的混合型缓蚀剂,其在Cu表面的吸附行为符合Langmuir等温吸附模型,吸附过程包括物理吸附和化学吸附,当用量为150 mgkg^-1时,缓蚀率可达到94.6%以上,并且具有良好的耐温性能。

关键词 ： 1-(2'-烷硫基乙酰基)-苯并三唑, Cu, 缓蚀剂, 阳极抑制, Langmuir等温吸附模型

Abstract：

A series of new corrosion inhibitors named 1-(2'-alkylsulfanylacetyl)-benzotriazole derivatives were synthesized by alkyl sulfhydryls of different lengths, sodium chloroacetate and benzotriazole. The corrosion inhibition effect of benzotriazole derivatives on copper was evaluated in 3.5%NaCl solution by means of weight loss and electrochemical testing methods, while the adsorption pattern of corrosion inhibitor molecules on the surface of copper was studied. The results show that the benzotriazole derivatives act as mixed type inhibitors with anode inhibition as dominative action. The adsorption of corrosion inhibitor molecules on copper surface obey Langmuir adsorption isotherm, including both physical and chemical adsorption. The synthesized benzotriazole derivatives possess high corrosion inhibition efficiency and excellent temperature resistance.

Key words： 1-(2'-alkylsulfanylacetyl)-benzotriazole copper corrosion inhibitor anode inhibition Langmuir adsorption isotherm

基金资助:国家海洋可再生能源专项资金项目 (GHME2013GC03)资助

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引用本文:

左翔,蒋裕丰,迟挺,胡鑫,曹冬梅,蔡烽. 新型含长链烷基苯并三唑缓蚀剂的制备与性能研究[J]. 中国腐蚀与防护学报, 2016, 36(5): 415-420.
Xiang ZUO, Yufeng JIANG, Ting CHI, Xin HU, Dongmei CAO, Feng CAI. Synthesis and Performance of New Benzotriazole Derivatives with Long Alkyl Chain as Corrosion Inhibitors. Journal of Chinese Society for Corrosion and protection, 2016, 36(5): 415-420.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2015.214 或 https://www.jcscp.org/CN/Y2016/V36/I5/415

图1 Cu在不同温度的3.5%NaCl溶液中的腐蚀速率和缓蚀剂在不同温度下的缓蚀效率

表1 Cu在含有不同浓度缓蚀剂的3.5%NaCl溶液中的失重实验数据

表2 缓蚀剂的Langmuir等温吸附式拟合参数

图2 缓蚀剂在25 ℃下的Langmuir等温吸附线

图3 Cu在含不同浓度缓蚀剂A2的3.5%NaCl溶液中的极化曲线

表3 Cu在含不同浓度缓蚀剂A2的3.5%NaCl溶液中的极化参数

图4 Cu在含不同浓度缓蚀剂A2的3.5%NaCl溶液中的Nyquist图

表4 Cu在含不同浓度缓蚀剂A2的3.5%NaCl溶液中的阻抗拟合参数

图5 EIS等效电路

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