Advanced anti-corrosion coatings prepared froma-zirconium phosphate/polyurethane nanocomposites

Introduction

The first successful application of a-Zirconium Phosphate/polyurethane (ZrP/PU) nanocomposites for corrosion protection.

Experimental

 
Results and discussion

1. Synthesis and characterization of ZrP, PU and ZrP/PU




2. Optical transparency of pure PU and ZrP/PU films



3. Gas barrier properties of ZrP/PU films

 


4. Potentiodynamic measurements


3.5 Electrochemical impedance spectroscopy (EIS)

 



Conclusions

Compared to pure PU films, ZrP/PU nanocomposite films with a low ZrP content (e.g., 5 wt%) show a reduction of about 40% in H2O permeability.

The reduced H2O permeability was attributed to the good dispersion of the ZrP filler material,which increased the length of H2O gas diffusion pathways.

A series of electrochemical studies was conducted on the corrosion protection properties of the ZrP/PU nanocomposite coatings.

The corrosion potential and polarization resistance increased, whereas the corrosion current and the corrosion rate decreased with an increase in ZrP content, confirming that ZrP–PU coatings provide effective anti-corrosion protection.

The ZrP/PU nanocomposites showed superior corrosion inhibition,suggesting that they have great potential for use in the anticorrosion coating industry.