Abstract
The immense growth brought by the global anti-corrosion industry translates into a massive demand for petroleum-based raw materials for manufacturing these industrial products. Today, there is widespread popular support for using renewable raw materials in the coatings industry to break free from dependency on petroleum. This research is focused to the develop a bio-based polyurethane (PU) coating where the corrosion performance of newly formulated soy-based PU coatings with different concentrations of nanographite deposited on mild steels in an aerated 3.5% NaCl solution was investigated. Water uptake and electrochemical polarization experiments evaluated the formulated coatings regarding their barrier and corrosion resistance properties. Morphological and physical properties of the coatings were also evaluated using optical microscopy, adhesion test, Fourier-Transform Infrared Spectroscopy (FTIR), and differential scanning calorimetry (DSC). Results show that as nanographite concentration increases, the uniform corrosion rate of mild steel decreases by multiple orders of magnitude, contrary to the water uptake resistance and the coating's surface adhesion which improves significantly. This research suggests that corrosion resistance resulted mainly from the hydrophobic nature of saturated components of soybean oil acylglycerols and graphite nanoparticles, and it was supported by the results demonstrated by FTIR spectra, where the soybean oil phosphate ester–polyurethane coating provides an inert matrix. Regarding novelty, this is the first report on using nonpretreated nanographite in a soy-based polyurethane coating to impart anti-corrosive properties for mild steel applications.
| Original language | English |
|---|---|
| Journal | Unknown journal |
| State | Published - 2025 |
