Influence of Rust Inhibitors on the Microstructure of a Steel Passive Film in Chloride Concrete

To compare the corrosion inhibition behaviors of rust inhibitors with different mechanisms on steel bars, resistance effect sodium molybdate (Na2MoO4), chromate (Na2CrO4), benzotriazole (BTA), N-N dimethyl ethanolamine, (Na2MoO4) + and (Na2CrO4) (BTA) bars in a simulated chloride concrete pore solution was studied. The effects types were assessed by electrochemical impedance spectroscopy (EIS), X-ray photoelectron (XPS), diffraction (XRD), scanning electron microscopy (SEM). film formation characteristics passive bar surface expounded. results show that: When acted together, value capacitive reactance arc radius largest, density efficiency highest. composition primarily composed iron compounds, it also contained oxide adsorption films that formed inhibitors. proportional to compactness film.