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中国腐蚀与防护学报  2011, Vol. 31 Issue (2): 155-159    
  研究报告 本期目录 | 过刊浏览 |
温度对改性硅溶胶涂层结构及耐蚀性能的影响
崔学军1,2,李国军2,董洪亮2,任瑞铭2
1. 四川理工学院材料腐蚀与防护四川省高校重点实验室 自贡 643000
2. 大连交通大学辽宁省轨道交通关键材料重点实验室 大连 116028
EFFECT OF TEMPERATURE ON STRUCTURE AND CORROSION RESISTANCE OF MODIFIED SILICA SOL COATINGS
CUI Xuejun1,2, LI Guojun2, DONG Hongliang2,REN Ruiming2
1. Key Laboratory of Materials Corrosion and Protection of Sichuan Colleges and Universities, Sichuan University of Science and Engineering, Zigong 643000
2. Liaoning Key Materials Laboratory for Railway,Dalian Jiaotong University, Dalian 116028
全文: PDF(2367 KB)  
摘要: 通过甲基三甲氧基硅烷的水解-缩聚对工业硅溶胶改性,获得了透明的改性硅溶胶及涂层。用热重/差热法(TG-DTA)对硅溶胶改性前后涂层的热性能进行表征,结果表明改性硅溶胶涂层具有一定的耐高温性能。在 512℃左右开始发生明显的失重,质量损失小于7%;傅里叶红外光谱(FTIR)分析表明改性硅溶胶涂层内部的大量羟基在 200℃左右交联固化完全,在500℃左右发生Si-C 键的燃烧分解;XRD分析表明改性硅溶胶涂层由非晶态物质构成, 500℃左右的热处理涂层未晶化;光学显微镜观察及耐腐蚀性分析结果表明,改性硅溶胶涂层表面光滑致密,并具有一定的耐腐蚀性能,随热处理温度(≤500℃)的升高,涂层更致密,耐腐蚀性能增强。
关键词 涂料成膜物质甲基三甲氧基硅烷硅溶胶耐蚀性    
Abstract:Organic-inorganic hybrid transparent sol and coatings were prepared by sol-gel process, using methyltrimethoxysilane and industrial silica sol as raw materials. Thermal stability of the modified silica sol was investigated by TG-DTA. The results indicate that the coatings have good heat resistance, mass loss begins to increase obviously at about 512℃, and it is still less than 7%. The results of FTIR show that hydroxyls of the modified silica sol can completely cross-link at about 200℃ and C-Si bonds begin to decompose at about 512℃. Surface morphology and structure of the heat-treated coatings at different temperatures were also characterized respectively by optical microscope and XRD, and the results illustrate that the modified silica sol coatings are amorphous, transparent and dense, and can be stable even at 500℃ for 1 h. Corrosion resistance performance of the modified silica sol coatings applied on aluminum alloys was tested, and the results prove that the corrosion resistance is strengthened because coating becomes denser with increasing heat treatment temperature (≤500℃).
Key wordscoatings    film-forming substance    methyltrimethoxysilane    modified silica sol    corrosion resistance
收稿日期: 2010-03-01     
ZTFLH: 

TQ63

 
基金资助:

辽宁省计划资助(2008402024)项目

通讯作者: 崔学军     E-mail: cxj_2046@163.com
Corresponding author: CUI Xuejun     E-mail: cxj_2046@163.com
作者简介: 崔学军,男,1978年生,副研究员,研究方向为材料腐蚀与防护

引用本文:

崔学军,李国军,董洪亮,任瑞铭. 温度对改性硅溶胶涂层结构及耐蚀性能的影响[J]. 中国腐蚀与防护学报, 2011, 31(2): 155-159.
CUI Hua-Jun, LI Guo-Jun, REN Rui-Ming, YU Xiu-Chun, DONG Hong-Liang. EFFECT OF TEMPERATURE ON STRUCTURE AND CORROSION RESISTANCE OF MODIFIED SILICA SOL COATINGS. J Chin Soc Corr Pro, 2011, 31(2): 155-159.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2011/V31/I2/155

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