Highly protective polyolefin coating modified with ceria nano particles treated with N,N,N',N'-Tetrakis(2-hydroxyethyl)ethylenediamine for corrosion protection of carbon steel

A polyolefin coating was modified with cerium oxide nanoparticles treated with N,N,N',N'-Tetrakis(2-hydroxyethyl)ethylenediamine (THEEDA) as corrosion inhibitor for corrosion protection of carbon steel. Electrochemical Impedance Spectroscopy tests carried out in 0.05 M NaCl revealed low-frequency impedance modulus around 1012 omega cm2 for the modified coating without significant changes after three months of immersion. The self-healing ability of modified coating was studied by combining different localized electrochemical techniques, namely localized impedance spectroscopy (LEIS), the scanning vibrating electrode technique (SVET), and scanning fiber-optic dissolved oxygen microsensor. This comprehensive study confirmed the ability of ceria nanoparticles treated with THEEDA to mitigate corrosion thanks to the synergistic protective role of ceria nanoparticles and THEEDA that inhibit both cathodic and anodic activities, respectively.

Automated summary

In this study, a polyolefin coating modified with cerium oxide nanoparticles treated with THEEDA was used as a corrosion inhibitor for carbon steel. The coating showed excellent corrosion protection, with low-frequency impedance modulus around 1012 omega cm2 even after three months of immersion. The self-healing ability of the modified coating was confirmed through various localized electrochemical techniques, which demonstrated the synergistic protective role of ceria nanoparticles and THEEDA in inhibiting both cathodic and anodic activities.