2-氨基芴双希夫碱在模拟循环冷却水中对低碳钢的缓蚀性能

doi:10.11896/cldb.20030120

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Abstract The raw materials 2-aminofluorene, pyridine-2,6-dicarbaldehyde and bromomalonaldehyde were used to synthesize pyridine-2,6-dicarbaldehyde-2-aminofluorene bis-Schiff base (A1) and bromopropanedialdehyde-2-aminofluorene bis-Schiff base (A2) by solution method. The structures of A1 and A2 were characterized by IR and FTMS. The corrosion inhibition performances of A1 and A2 were investigated by weight loss, electrochemical measurements and scanning electron microscope (SEM). The corrosion inhibition mechanisms of A1 and A2 were explored by quantum chemical calculation. The weight loss analysis showed that A1 and A2 exhibited the maximum inhibition efficiencies of 96.85% and 93.46% with the concentration of 1.0 mmol·L^-1 in simulated circulating cooling water at 25 ℃, respectively. Electrochemical research showed that the two inhibitors have better corrosion inhibition efficiency. Both A1 and A2 followed Langmiur adsorption isotherm on the mild steel surface, and the value of ΔGads^θ are -27.02 kJ·mol^-1 and -29.03 kJ·mol^-1, respectively. These are mixed type adsorption and are anode type corrosion inhibitors mainly based on anode inhibition. Both A1 and A2 showed good corrosion inhibition performance in simulated circulating cooling water, and A1 has better inhibition property than A2.

Key words： 2-aminofluorene simulated circulating cooling water mild steel bis-Schiff base adsorption mechanism corrosion inhibition performance

Published: 01 July 2021

CLC number:

TG174.4

Fund:Natural Science Foundation of Guangxi Province (2016GXNSFAA380109, 2018GXNSFAA294042),Guangxi Special Experts Special Funding (2401007012).

About author:: Wenchang Wei is currently studying for the master's degree in Guilin University of Technology, mainly engaged in the synthesis and application of organic che-mistry.
Zheng Liu, master, professor and doctoral supervisor, currently teaches at College of Chemical and Bioengineering, Guilin University of Technology. She graduated from Xiangtan University in 2006 with a doctorate degree. In recent years, she has been published more than 60 scientific research papers, including over 30 SCI or EI papers.

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	WEI Wenchang
	LIU Zheng
	WEI Runzhi
	LYU Yiju
	HAN Jiaxing
	ZHANG Shufen

Cite this article:

WEI Wenchang,LIU Zheng,WEI Runzhi, et al. Corrosion Inhibition Performance of 2-aminofluorene Bis-Schiff Base on Mild Steel in Simulated Circulating Cooling Water[J]. Materials Reports, 2021, 35(12): 12196-12201.

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http://www.mater-rep.com/EN/10.11896/cldb.20030120 OR http://www.mater-rep.com/EN/Y2021/V35/I12/12196

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