Rust Conversion Performance of Phosphoric Acid-Gallic Acid in Vinyl Chloride Acrylic Emulsion

This work studied the application of phosphoric acid-gallic acid in vinyl chloride acrylic emulsion and its rust conversion performance. The increase affected stability system, leading to rapid precipitation flocculent precipitation. Rust coating (RCC) showed best synergistic effect when gallic (GA) was 0.2 wt.% (PA) 2 wt.%. XRD FTIR analysis show that components adherent (AR) are α-FeOOH, γ-FeOOH Fe3O4. products ferric phosphate (FP) gallate (FG). RCC can effectively treat rusted steel (RS) produced by simulated marine atmospheric corrosion. corrosion current density reduced three orders magnitude, adhesion reached 2.75 MPa, salt spray resistance 20 days. results Raman, XPS, SEM EDS ionic dissolution iron, complexation further oxidation reactions occur at interface between RCC. After treatment, unreacted (UR) affects improvement strength anti-corrosion