| SHEN Lu-li,PENG Shu-sen,WANG Gang,ZENG Zhi-xiang,WU Xue-dong.Corrosion Protection of Copper Alloy H90 by Mercapto Functionalized Organosilicone Sol-Gel Coating[J],47(10):30-36 |
| Corrosion Protection of Copper Alloy H90 by Mercapto Functionalized Organosilicone Sol-Gel Coating |
| Received:January 03, 2018 Revised:October 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.10.004 |
| KeyWord:mercapto organosilicone sol-gel coating copper alloy adhesive force corrosion protection |
| Author | Institution |
| SHEN Lu-li |
1.a.Key Laboratory of Marine Materials and Related Technologies, b.Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo , China |
| PENG Shu-sen |
2.School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang , China |
| WANG Gang |
1.a.Key Laboratory of Marine Materials and Related Technologies, b.Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo , China |
| ZENG Zhi-xiang |
1.a.Key Laboratory of Marine Materials and Related Technologies, b.Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo , China |
| WU Xue-dong |
1.a.Key Laboratory of Marine Materials and Related Technologies, b.Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo , China |
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| Abstract: |
| The work aims to study the protective properties of mercapto-organosilica sol-gel coating on copper alloy H90. Mercapto sol of mercaptopropyltrimethoxysilane (MAPMS) and ethylorthosilicate (TEOS) in different proportions were used as precursors and acetic acid was taken as catalyst to prepare the mercapto of functionalized organosilicone sol-gel. The as-prepared organosilicone sol-gel was coated on copper alloy H90 by dip coating and dried at 120 ℃. The electrochemistry, salt spray, contact angle, etc., were used to study the corrosion resistance, hydrophobicityand, pencil hardness of mercapto functional sol-gel coating. When the molar ratio of MAPMS:TEOS reached 1.5:1, the coating obtained the best corrosion resistance and the self-corrosion current density was 1.16×10?8 A/cm2, the pencil hardness of coating was 5H and the adhesion grade reached level 0. In neutral salt spray test, the test group with the molar ratio of 1:1 had a few spots on the 8th day, but the corrosion did not expand in the next 30 days. The other test groups did not have obvious corrosion during 30-day test. The mercapto-organosilicone sol-gel coating has good hardness and adhesion and can significantly improve the corrosion resistance of copper alloy H90. |
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