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304不锈钢表面纳米铝改性有机硅涂层的高温氧化和电化学行为
High Temperature Oxidation and Electrochemical Corrosion Behavior of Al Nano-particle Modified Silicone Coating on 304 Stainless Steel

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杜瑶 1,2   王成 1 *   朱圣龙 1,3   王福会 3,4  
文摘 研究了纳米铝改性有机硅高温涂层的固化、抗650℃高温氧化性能和耐3.5% NaCl水溶液电化学腐蚀性能.当聚氨酯:有机硅的质量分数达到1:3或更高时,有机硅涂料可以在24 h内完成常温固化.制备出的纳米铝改性有机硅高温涂层表面致密,没有微观裂纹等缺陷.纳米铝改性的有机硅涂层显著提高了304不锈钢抗氧化性能,经1028 h氧化实验,基体几乎没有发生氧化,涂层没有出现开裂和剥落.纳米铝改性的有机硅涂层还显著提高了氧化后的304不锈钢耐氯化钠水溶液腐蚀性能,无涂层的304不锈钢氧化后形成的氧化膜低频阻抗仅3.2 Ω·cm~2,而涂装涂层的不锈钢的低频阻抗约为1.1×10~5 Ω·cm~2.
其他语种文摘 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·cm~2, while that of the sample with coating was as high as 1.1×10~5 Ω·cm~2.
来源 材料研究学报 ,2019,33(12):942-948 【核心库】
DOI 10.11901/1005.3093.2019.159
关键词 材料失效与保护 ; 耐高温氧化 ; 纳米改性 ; 有机硅 ; 常温固化 ; 304不锈钢
地址

1. 中国科学院金属研究所金属腐蚀与防护实验室, 沈阳, 110016  

2. 中国科学技术大学材料科学与工程学院, 沈阳, 110016  

3. 沈阳材料科学国家研究中心, 沈阳材料科学国家研究中心, 沈阳, 110016  

4. 东北大学材料科学与工程学院, 沈阳, 110819

语种 中文
文献类型 研究性论文
ISSN 1005-3093
学科 金属学与金属工艺
文献收藏号 CSCD:6638071

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引证文献 3

1 李奎 建筑用316L不锈钢表面树脂固化涂层600℃氧化行为分析 真空科学与技术学报,2020,40(9):867-870
被引 0 次

2 卢壹梁 纳米Al_2O_3和TiO_2改性有机硅涂层对304不锈钢高温氧化行为的影响 材料研究学报,2021,35(6):458-466
被引 0 次

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