A corrosion-resistance waterborne polyacrylate coatings based on novel phosphate esters polymeric surfactant

Novel polymeric surfactant (MBSP) is obtained with phosphate esters monomer (PEGMAP) as the functional monomer in the presence of other acrylic monomers. The synthesized MBSP is further used as emulsifier for preparing the corrosion-resistance polyacrylate coatings (PAMBSP). Attenuated total reflection Fourier transform infrared (ATR-FTIR) and nuclear magnetic resonance results show that phosphate esters functional monomer was introduced into the MBSP molecular chains. The surface tension measurements illustrated that with the PEGMAP content 1%, the lowest surface tension 44.45 mN/m and the equilibrium concentration critical micellar concentration (CMC) 1.02 g/L of MBSP are obtained. The stability analysis of the PAMBSP emulsions demonstrates that the Turbiscan Stability Index (TSI) value decreased from 0.64 to 0.32 with the PEGMAP content increased from 1% to 3%. The electrochemical analysis displays that with PEGMAP content 3%, the biggest corrosion potential −0.02 V, smallest etching current density 2.19 × 10 −9 A•cm 2 and biggest impedance modulus 1.46 × 10 7 Ω·cm 2 was obtained.