一种基于MOFs与BTA的纳米缓蚀胶囊对铜的缓蚀行为研究

doi:10.11902/1005.4537.2021.288

中国腐蚀与防护学报

2022, Vol. 42

Issue (6): 1058-1064 DOI: 10.11902/1005.4537.2021.288

研究报告

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一种基于MOFs与BTA的纳米缓蚀胶囊对铜的缓蚀行为研究

连宇博(

), 张庆祝, 韩创辉, 李文娟, 翁华涛, 蒋伟

西安长庆化工集团有限公司西安 710018

Inhibition Behavior of a Nano-corrosion Inhibitor Capsule Prepared from MOFs and BTA for Copper

LIAN Yubo(

), ZHANG Qingzhu, HAN Chuanghui, LI Wenjuan, WENG Huatao, JIANG Wei

Xi'an Changqing Chemical Group Co. Ltd., Xi'an 710018, China

引用本文:

连宇博, 张庆祝, 韩创辉, 李文娟, 翁华涛, 蒋伟. 一种基于MOFs与BTA的纳米缓蚀胶囊对铜的缓蚀行为研究[J]. 中国腐蚀与防护学报, 2022, 42(6): 1058-1064.
Yubo LIAN, Qingzhu ZHANG, Chuanghui HAN, Wenjuan LI, Huatao WENG, Wei JIANG. Inhibition Behavior of a Nano-corrosion Inhibitor Capsule Prepared from MOFs and BTA for Copper[J]. Journal of Chinese Society for Corrosion and protection, 2022, 42(6): 1058-1064.

全文: PDF(6061 KB) HTML

摘要:

通过水热法合成了结构立体、具有明显孔道结构的MOF-5。进一步通过负压法将苯并三氮唑负载进MOF-5形成BTA@MOF缓蚀胶囊。采用TEM、SEM、FT-IR、XRD以及电化学测试等手段对BTA@MOF的结构以及缓蚀性能进行表征评价。结果表明：缓蚀剂分子成功负载进MOF-5内部孔道,制备的缓释剂胶囊具有缓慢释放的特性,能够有效抑制铜的腐蚀。

关键词 ：金属有机框架化合物, 缓蚀剂胶囊, 缓慢释放, 金属防护

Abstract：

A three-dimensional metal organic frame material (MOF-5) was synthesized by hydrothermal method, and then, the corrosion inhibitor benzotriazole (BTA) molecule was loaded into MOF-5 to form corrosion inhibitor capsules. The structures and corrosion inhibition properties of the prepared BTA@MOF-5 was characterized by means of TEM, SEM, FT-IR, XRD and electrochemical testing techniques. The results show that the prepared MOF-5 can be an ideal candidate as an inhibitor carrier, while the BTA molecules were successfully loaded into MOF-5. Furthermore, the acquired BTA@MOF-5 had the characteristics of slow release for corrosion inhibitor benzotriazole, which could provide corrosion protection for copper.

Key words： BTA@MOF-5 corrosion inhibitor capsule sustained release metal protection

收稿日期: 2021-10-19

ZTFLH:

TG174.42

作者简介: 连宇博,男,1991年生,工程师

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https://www.jcscp.org/CN/10.11902/1005.4537.2021.288 或 https://www.jcscp.org/CN/Y2022/V42/I6/1058

图1 MOF-5和BTA@MOF-5的微观形貌

图2 BTA、MOF-5和BTA@MOF-5的FT-IR谱图

图3 BTA、MOF-5和BTA@MOF-5的XRD谱图

图4 BTA、MOF-5和BTA@MOF-5的热重分析曲线

图5 BTA缓蚀剂的标准吸光度曲线和浓度标准曲线图

图6 MOF-5释放的BTA的UV吸光谱随时间的变化

表1 100 mg/L BTA@MOF-5溶液中不同时间后BTA的吸光度和对应浓度

图7 纯铜在未添加和添加缓蚀剂的3.5%NaCl溶液中定时测量的电化学阻抗谱图

Sample	R_ct / Ω·cm²	C_dl		R_f / Ω·cm²	C_f		η / %
Sample	R_ct / Ω·cm²	Y₀₁ / Sⁿ ·Ω^-1·cm^-2	$n 1$	R_f / Ω·cm²	Y₀₂ / Sⁿ ·Ω^-1·cm^-2	n₂	η / %
Blank	172.3	33.85×10^-6	0.8397	0.32×10⁴	54.81×10^-5	0.4253	---
MOF-5	52.74	10.08×10^-6	0.7673	0.59×10⁴	151.6×10^-5	0.4314	---
@-1 h	3515	5.823×10^-6	0.8558	1.36×10⁴	2.372×10^-5	0.4962	80.5
@-2 h	3554	5.301×10^-6	0.8565	1.68×10⁴	2.085×10^-5	0.5129	83.4
@-3 h	3710	4.958×10^-6	0.8534	2.19×10⁴	2.039×10^-5	0.4824	87.0
@-4 h	4678	4.659×10^-6	0.8527	2.40×10⁴	1.751×10^-5	0.5171	88.4
@-5 h	5486	4.441×10^-6	0.8507	2.62×10⁴	1.452×10^-5	0.5454	89.5
@-6 h	6095	4.076×10^-6	0.8537	2.89×10⁴	1.263×10^-5	0.569	90.5

表2 纯铜在3.5% NaCl溶液中电化学阻抗谱拟合参数

图8 纯铜在3.5% NaCl溶液中的极化曲线

表3 纯铜在3.5%NaCl溶液中极化曲线拟合参数

图9 纯铜在3.5%NaCl溶液中浸泡24 h后的SEM形貌

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