HDT自组装膜对银的缓蚀作用*

doi:10.11901/1005.3093.2015.601

材料研究学报

2016, Vol. 30

Issue (9): 697-702 DOI: 10.11901/1005.3093.2015.601

研究论文

本期目录 | 过刊浏览

HDT自组装膜对银的缓蚀作用*

鲁文晔¹,陈蝶依²,汤涛¹,陈步荣¹

1. 南京工业大学材料科学与工程学院南京 210009
2. 南京大学匡亚明学院南京 210023

Corrosion Inhibition of Silver by HDT Self-assembled Monolayers

Wenye LU¹,Dieyi CHEN²,Tao TANG¹,Burong CHEN^1,^*

1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
2. Kuang Yaming School, Nanjing University, Nanjing 210023, China

引用本文:

鲁文晔,陈蝶依,汤涛,陈步荣. HDT自组装膜对银的缓蚀作用*[J]. 材料研究学报, 2016, 30(9): 697-702.
Wenye LU, Dieyi CHEN, Tao TANG, Burong CHEN. Corrosion Inhibition of Silver by HDT Self-assembled Monolayers[J]. Chinese Journal of Materials Research, 2016, 30(9): 697-702.

全文: PDF(1936 KB) HTML

摘要:

在乙醇溶液中使用十六硫醇(HDT)在银表面制备了自组装膜(SAMs), 用极化曲线、反射率、EPMA、AFM、XPS等方法研究了HDT SAMs对银的缓蚀效果及吸附行为。结果表明, HDT能在银表面形成不影响外观、稳定致密的SAMs, 有效抑制银的腐蚀。在浓度为0.05 mol/dm³的Na₂S溶液中, 当HDT浓度为0.1 mol/dm³时缓蚀效率达到91.7%, HDT是以阴极型为主的混合型缓蚀剂。HDT在银表面的吸附行为符合Langmuir吸附等温式, 吸附过程包括物理吸附和化学吸附。

关键词 ：金属材料, 十六烷基硫醇, 自组装膜, 银, 缓蚀

Abstract：

The self-assembled monolayers (SAMs) of hexadecane-thiol (HDT) were prepared on silver surface in ethanol solution. The adsorption behavior of HDT SAMs on silver surface and their corrosion inhibition were investigated by means of polarization curve, reflectance, EPMA, AFM and XPS. The results indicate that the HDT SAMs are dense and stable and do not affect the original appearance of silver, while exhibit also excellent inhibiting effect. In the solution with 0.05 mol/ dm³ Na₂S, the inhibition efficiency is up to 91.7% for the HDT SAMs prepared in the ethanol solution with 0.1 mol/dm³ HDT. The polarization curve shows that HDT acts as a mixed type inhibitor with cathodic inhibition as dominative action. The adsorption of HDT on the silver surface obeys the Langmuir adsorption law and contains both physisorption and chemisorption.

Key words： metallic materials hexadecane-thiol self-assembled monolayer silver corrosion inhibition

收稿日期: 2015-12-02

基金资助:* 江苏高校优势学科建设工程资助项目

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https://www.cjmr.org/CN/10.11901/1005.3093.2015.601 或 https://www.cjmr.org/CN/Y2016/V30/I9/697

图1 银电极组装HDT SAMs过程的电位-时间曲线

图2 不同浓度HDT SAMs覆盖的银电极在0.05 mol/L Na2S溶液中的极化曲线

表1 不同浓度HDT SAMs覆盖的银电极在0.05 mol/L Na2S溶液中电化学参数

图3 bare和HDT的加速变色实验结果

图4 银表面形成SAMs前后的反射率

图5 银表面形成HDT SAMs后的EPMA图谱

表2 银表面形成HDT SAMs后EPMA元素分析结果

图6 银表面形成HDT SAMs后的AFM图

图7 银表面形成HDT SAMs前后的XPS全谱

图8 银形成HDT SAMs前后的O1s的光电子能谱

图9 银形成HDT SAMs后的S2p的光电子能谱

图10 Langmuir等温式模型拟合的吸附曲线图

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