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| High Temperature Oxidation and Electrochemical Corrosion Behavior of Al Nano-particle Modified Silicone Coating on 304 Stainless Steel |
Yao DU1,2,Cheng WANG1( ),Shenglong ZHU1,3,Fuhui WANG3,4 |
1. Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
3. Shenyang National Laboratory for Materials Science, Shenyang 110016, China
4. School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China |
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Cite this article:
Yao DU,Cheng WANG,Shenglong ZHU,Fuhui WANG. High Temperature Oxidation and Electrochemical Corrosion Behavior of Al Nano-particle Modified Silicone Coating on 304 Stainless Steel. Chinese Journal of Materials Research, 2019, 33(12): 942-948.
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Abstract Al nano-particle modified organosilicone coatings were prepared on stainless steel 304SS. The curing properties at room temperatures, high temperature oxidation behavior at 650oC in air and electrochemical corrosion behavior in 3.5% NaCl solution of the coatings were investigated. The silicone coatings can be cured at room temperatures in 24 h only when the mass ratio of polyurethane over silicone is equal to or higher than 1:3. The as-prepared silicone coatings were smooth and free of cracks. The high temperature oxidation resistance of 304SS was greatly improved by applying the modified silicone coating. After oxidized for 1028 h at 650oC in air, the oxide scale on the coated 304SS was hardly discernable, while the coatings remained intact and free of cracks. Besides, after high temperature oxidation, the electrochemical corrosion resistance of the 304SS coated with modified silicone coating in NaCl solution was greatly improved, too. Without the protection of the coating, the impedance at low frequency of oxidized 304SS without coating was as low as 3.2 Ω·cm2, while that of the sample with coating was as high as 1.1×105 Ω·cm2.
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Received: 18 March 2019
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