A novel potassium zinc phosphate (PZP) pigment was synthesized in the presence of benzotriazole (BTA) as a fourth generation of zinc phosphate (ZP). The corrosion inhibition properties of PZP-BTA, compared to PZP and ZP, were investigated by electrochemical techniques in the extract solutions. The chemical composition of the carbon steel surface immersed in different extract solutions was studied by scanning electron microscopy with energy dispersive spectroscopy. The corrosion protective performance of the epoxy coatings reinforced with 10 wt% PZP-BTA and PZP was studied by salt spray test. Results showed superior performance of PZP-BTA in comparison to its former generation, i.e., PZP.

Subject
Electrochemical impedance spectroscopy, Steel surfaces, Inhibitor performance, Epoxy coatings, Sodium chloride solution, Extracts, Corrosion inhibitors, Steel, Carbon steel, Immersion, Zinc, Corrosion inhibitive pigments, Samples
Keywords:
benzotriazole, carbon steel, corrosion inhibitor, electrochemical impedance spectroscopy, polarization, potassium zinc phosphate pigment, x-ray photoelectron-spectroscopy
© 2016, NACE International
2016
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