Composition and properties of methyl silicate/silicate composite coatings
Methyl silicate/silicate composite coatings were prepared using a two-step method. The morphology, chemical composition, hydrophobicity and corrosion resistance of the coatings were investigated by scanning electron microscope (SEM) with energy dispersive spectrometer (EDS), Fourier transform infrar...
| প্রধান লেখক: | , , , , |
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| বিন্যাস: | প্রবন্ধ |
| ভাষা: | zho |
| প্রকাশিত: |
Journal of Materials Engineering
2021-05-01
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| মালা: | Cailiao gongcheng |
| বিষয়গুলি: | |
| অনলাইন ব্যবহার করুন: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000850 |
| _version_ | 1828078643248627712 |
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| author | ZHANG Shuang-hong YANG Bo ZHAI Wei LI Shuang KONG Gang |
| author_facet | ZHANG Shuang-hong YANG Bo ZHAI Wei LI Shuang KONG Gang |
| author_sort | ZHANG Shuang-hong |
| collection | DOAJ |
| description | Methyl silicate/silicate composite coatings were prepared using a two-step method. The morphology, chemical composition, hydrophobicity and corrosion resistance of the coatings were investigated by scanning electron microscope (SEM) with energy dispersive spectrometer (EDS), Fourier transform infrared spectroscopy (FT-IR), contact angle tests, neutral salt spray (NSS) tests and potentiodynamic polarization curve, respectively, and were compared with those of single silicate coating and methyl silicate coating. The corrosion mechanism of methyl silicate/silicate composite coatings were analysed by electrochemical impedance spectroscopy (EIS) as well as equivalent circuit. The results show that the compositions of methyl silicate/silicate composite coatings outer layer are the almost same as the compositions of single methyl silicate coating, different from single methyl silicate coating with lots of cracks on surface, the composite coatings are uniform and smooth with no crack, and the adhesion is good. Single silicate coating is hydrophilic. Compared with single silicate coating, methyl silicate/silicate composite coating is hydrophobic, corrosion inhibition of cathodic process is obviously enhanced, and polarization impedance of the composite coating is 5 times more than that of the single silicate coating,total impedance values of composite coatings are more than 100 kΩ·cm<sup>2</sup>, corrosion current density of composite coatings is reduced by 60%. |
| first_indexed | 2024-04-11T02:49:58Z |
| format | Article |
| id | doaj.art-9e66e5212cc94cc6a9106901e6071033 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T02:49:58Z |
| publishDate | 2021-05-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-9e66e5212cc94cc6a9106901e60710332023-01-02T16:33:55ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812021-05-0149516317010.11868/j.issn.1001-4381.2019.00085020210519Composition and properties of methyl silicate/silicate composite coatingsZHANG Shuang-hong0YANG Bo1ZHAI Wei2LI Shuang3KONG Gang4Guangzhou Special Pressure Equipment Inspection and Research Institute, Guangzhou 510663, ChinaGuangzhou Special Pressure Equipment Inspection and Research Institute, Guangzhou 510663, ChinaGuangzhou Special Pressure Equipment Inspection and Research Institute, Guangzhou 510663, ChinaGuangzhou Special Pressure Equipment Inspection and Research Institute, Guangzhou 510663, ChinaSchool of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, ChinaMethyl silicate/silicate composite coatings were prepared using a two-step method. The morphology, chemical composition, hydrophobicity and corrosion resistance of the coatings were investigated by scanning electron microscope (SEM) with energy dispersive spectrometer (EDS), Fourier transform infrared spectroscopy (FT-IR), contact angle tests, neutral salt spray (NSS) tests and potentiodynamic polarization curve, respectively, and were compared with those of single silicate coating and methyl silicate coating. The corrosion mechanism of methyl silicate/silicate composite coatings were analysed by electrochemical impedance spectroscopy (EIS) as well as equivalent circuit. The results show that the compositions of methyl silicate/silicate composite coatings outer layer are the almost same as the compositions of single methyl silicate coating, different from single methyl silicate coating with lots of cracks on surface, the composite coatings are uniform and smooth with no crack, and the adhesion is good. Single silicate coating is hydrophilic. Compared with single silicate coating, methyl silicate/silicate composite coating is hydrophobic, corrosion inhibition of cathodic process is obviously enhanced, and polarization impedance of the composite coating is 5 times more than that of the single silicate coating,total impedance values of composite coatings are more than 100 kΩ·cm<sup>2</sup>, corrosion current density of composite coatings is reduced by 60%.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000850sodium methyl silicatehydrophobicitysilicate composite coatingcorrosion resistance |
| spellingShingle | ZHANG Shuang-hong YANG Bo ZHAI Wei LI Shuang KONG Gang Composition and properties of methyl silicate/silicate composite coatings Cailiao gongcheng sodium methyl silicate hydrophobicity silicate composite coating corrosion resistance |
| title | Composition and properties of methyl silicate/silicate composite coatings |
| title_full | Composition and properties of methyl silicate/silicate composite coatings |
| title_fullStr | Composition and properties of methyl silicate/silicate composite coatings |
| title_full_unstemmed | Composition and properties of methyl silicate/silicate composite coatings |
| title_short | Composition and properties of methyl silicate/silicate composite coatings |
| title_sort | composition and properties of methyl silicate silicate composite coatings |
| topic | sodium methyl silicate hydrophobicity silicate composite coating corrosion resistance |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000850 |
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