| LIN Yuan-hua,MA Yu-cong,Mohd Talha,LI Bing,SHI Yun-Sheng,SUN Zhi-peng,TANG Liang.Effect of Silane Coating on Corrosion Resistance of 316L Stainless Steel[J],48(2):220-225 |
| Effect of Silane Coating on Corrosion Resistance of 316L Stainless Steel |
| Received:July 20, 2018 Revised:February 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.02.031 |
| KeyWord:corrosion silane coating electrochemistry stainless steel pitting |
| Author | Institution |
| LIN Yuan-hua |
1.a.State Key Laboratory of Oil and Gas Reservoir Geology and Development, Southwest Petroleum University, Chengdu , China |
| MA Yu-cong |
1.b.School of Materials Science and Engineering, Southwest Petroleum University, Chengdu , China |
| Mohd Talha |
1.b.School of Materials Science and Engineering, Southwest Petroleum University, Chengdu , China |
| LI Bing |
1.b.School of Materials Science and Engineering, Southwest Petroleum University, Chengdu , China |
| SHI Yun-Sheng |
1.b.School of Materials Science and Engineering, Southwest Petroleum University, Chengdu , China |
| SUN Zhi-peng |
1.b.School of Materials Science and Engineering, Southwest Petroleum University, Chengdu , China |
| TANG Liang |
2.Chongqing Xinyu Pressure Vessel Manufacturing Co., Ltd, Chongqing , China |
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| Abstract: |
| The work aims to improve the corrosion resistance of 316L stainless steel. The silane coating with 1,2-bis (tri-ethoxysilyl) ethane (BTSE) as main component was coated on the surface of the 316L stainless steel sample. The corrosion re-sistance of coating on 316 stainless steel was evaluated by electrochemical analysis. The surface morphology was analyzed by scanning electron microscopy and scanning electrochemical microscopy. The silane-coated sample surface was smoother and pitting corrosion was significantly improved when compared to the silane-coated 316L stainless steel sample in the same corrosive environment. From the electrochemical test results, the corrosion potential of the silane-coated 316L stainless steel sample was ?565.02 mV and the corrosion potential of the uncoated-silane sample was ?796.01 mV. The corrosion potential of silane-coated 316L stainless steel sample was significantly higher than that of uncoated-silane sample, and the corrosion tendency was significantly reduced. In addition, the silane-coated 316L stainless steel sample had a corrosion current of 2.5177 μA and the uncoated sample had a corrosion current of 5.4291 μA. The silane-coated sample exhibited lower corrosion current and showed better corrosion resistance. From the scanning electrochemical microscopy image, the uncoated 316L stainless steel sample had a current range of ?3.144×10?9 ~ ?1.957×10?9 A, and the silane-coated 316L stainless steel sample had a current range of ?3.004×10?9 ~ ?1.975×10?9 A. The silane-coated sample had a narrower current range and less corrosion. Therefore, silane coating on the surface of 316L stainless steel can slow the corrosion of the sample to a certain extent. The silane coating acts as a physical barrier and significantly improves the corrosion resistance of 316L stainless steel. |
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