| DONG Pei-lin.Preparation and properties of SiO2 microspheres loading with BTA inhibitor type self-healing corrosion coating[J],45(3):158-163,177 |
| Preparation and properties of SiO2 microspheres loading with BTA inhibitor type self-healing corrosion coating |
| Received:December 04, 2015 Revised:March 20, 2016 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2016.03.026 |
| KeyWord:coating corrosion inhibitor immersion mesoporous silica impedance self-healing |
| Author | Institution |
| DONG Pei-lin |
Gudong Oil Production Plant, Shengli Oil Field, Dongying , China |
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| Abstract: |
| In order to study the corrosion resistance and anti-corrosion mechanism of the self-healing coating which was prepared by adding corrosion inhibitors loaded mesoporous SiO2 microspheres into 7537 polyurethane. Method The benzotriazole (BTA) was loaded into SiO2 microspheres by negative pressure-impregnation method. The morphology and crystal structure of SiO2 microspheres and loading content of BTA were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The effect of SiO2, BTA, SiO2-BTA addition on corrosion resistance of the coatings were studied by potentiodynamic polarization curve measurement and electrochemical impedance spectroscopy (EIS). Results SEM images showed the size of SiO2 is approximately 1 μm. TGA showed the loading content of BTA is 32.38 wt%. According to immersion test, corrosion appeared on all kinds of coatings in the progress of immersion apart from the PU SiO2/BTA coating samples. The electrochemical polarization curve and EIS results showed that PU+SiO2/BTA coating samples always has the lowest current density and higher impedance values. |
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