Corrosion Inhibition of Vanillin and Amino Acid Shrinks Schiff Base on Pure Aluminum

LI Yu - ying, YU Jin, SUN Shuo

doi:10.16577/j.cnki.42-1215/tb.2021.03.005

Materials Protection >

2021 , Vol. 54 >Issue 3: 28 - 33

DOI: https://doi.org/10.16577/j.cnki.42-1215/tb.2021.03.005

Corrosion Inhibition of Vanillin and Amino Acid Shrinks Schiff Base on Pure Aluminum

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(College of Science, Shenyang University of Technology, Shenyang 110870, China)

Received date: 2020-09-20

Online published: 2025-07-10

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Abstract

For promoting the application of amino acids inhibitors, the corrosion inhibition effect and mechanism of vanillin L - lysine and vanillin L - tyrosine on 1060 pure aluminum in 2 mol/L HCl solution by electrochemical measurements, scanning electron microscopy, energy spectrum analysis and kinetic methods. Result showed that vanillin L - lysine Schiff base and vanillin L - tyrosine Schiff base could effectively inhibit the corrosion of pure aluminum in 2 mol/L HCl solution at 25 ℃. When the concentration reached 2 g/L and 4 g/L, respectively, the best corrosion inhibition efficiency was obtained, and all of them acted as a mixed - type inhibitor. EDS data indicated that electron - negative elements such as O and N in Schiff base molecules were adsorbed on the surface of 1060 pure aluminum. These two Schiff based corrosion inhibitors increased the corrosion activation energy of pure aluminum by adsorbing and forming a film on the surface of 1060 pure aluminum, which led to a higher energy barrier in the corrosion reaction and the effectively decrease of the corrosion rate of 1060 pure aluminum in 2 mol/L HCl solution.

Key words： Schiff base; 1060 pure aluminum; vanillin; lysine; tyrosine; corrosion inhibition

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LI Yu - ying, YU Jin, SUN Shuo . Corrosion Inhibition of Vanillin and Amino Acid Shrinks Schiff Base on Pure Aluminum[J]. Materials Protection, 2021 , 54(3) : 28 -33 . DOI: 10.16577/j.cnki.42-1215/tb.2021.03.005

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