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材料研究学报  2016, Vol. 30 Issue (2): 108-114    DOI: 10.11901/1005.3093.2015.287
  本期目录 | 过刊浏览 |
新型硅土对电力金具涂层防护作用的影响*
赵书彦1, 陈军君2, 刘福春1(), 徐松2, 柯伟1, 胡波涛2, 揭敢新3
1. 中国科学院核用材料与安全评价重点实验室 中国科学院金属研究所 沈阳 110016
2. 湖南省电力公司科学研究院 长沙 410007
3. 工业产品环境适应性国家重点实验室 中国电器科学研究院有限公司 广州 510663
Effect of New Kinds of Sillitin on Performance of Polyurethane Coating for Electric Power Fittings
ZHAO Shuyan1, CHEN Junjun2, LIU Fuchun1,**(), XU Song2, KE Wei1, HU Botao2, JIE Ganxin3
1. Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2. Hunan Electric Power Corporation Research Institute, Changsha 410007, China
3. State Key Laboratory of Environmental Adaptability for Industrial Products,China National Electric Apparatus Research Institute Co., Ltd, Guangzhou 510633, China
引用本文:

赵书彦, 陈军君, 刘福春, 徐松, 柯伟, 胡波涛, 揭敢新. 新型硅土对电力金具涂层防护作用的影响*[J]. 材料研究学报, 2016, 30(2): 108-114.
Shuyan ZHAO, Junjun CHEN, Fuchun LIU, Song XU, Wei KE, Botao HU, Ganxin JIE. Effect of New Kinds of Sillitin on Performance of Polyurethane Coating for Electric Power Fittings[J]. Chinese Journal of Materials Research, 2016, 30(2): 108-114.

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摘要: 

分别制备了含有M型和Z型硅土的两种丙烯酸聚氨酯复合涂料.喷涂在热浸镀锌钢板上的涂料形成的涂层, 具有良好的力学性能.添加M型和Z型硅土的涂层, 其耐磨性比空白涂层分别提高了57.1%和85.7%, 硬度提高了14.5%和41.8%.用盐雾试验和电化学阻抗谱考察了两种涂层的耐腐蚀性.结果表明, 添加两种硅土的涂层具有更好的耐腐蚀性.其原因是, 两种硅土具有微米粒状氧化硅与纳米片状高岭土的组合结构, 纳米片状高岭土含量的提高有利于改进抗渗透性和力学性能.

关键词 材料失效与保护电力金具防护涂层电化学阻抗谱新型硅土耐磨性    
Abstract

Polyurethane coatings with two kinds of sillitin, i.e. M type and Z type sillitin respectively as filler were prepared and sprayed on hot dip galvanized steel sheets. The coatings exhibited better mechanical properties than the simple polyurethane coating, i.e. the wear resistance and the hardness of the polyurethane coating may be enhanced by 57.1% and 14.5%, as well as 85.7% and 41.8% for the addition of M type and Z type sillitin respectively. The coatings with the two types of sillitin exhibited also better corrosion resistance. The reason is that two types of sillitin are of a special structure composed of micro-sized granular silica and nano-flake kaolin clay, and the sillitin possesses high amount of nano-flake, which may be beneficial to the enhancement of the permeation resistance and mechanical properties of the coatings.

Key wordsmaterials failure and protection    electrical fittings protective coating    electrochemical impedance spectroscopy    new sillitin    abrasion resistance
收稿日期: 2015-05-15     
ZTFLH:  TG174  
基金资助:* 国家电网公司总部科技项目KG12K16004和广东省中国电器院风电装备腐蚀控制关键技术院士工作站项目2013B090400023资助
作者简介: 通讯作者:刘福春, 研究员
图1  两种硅土粉体SEM照片和EDS图
图2  两种硅土粉体的XRD分析
Sillitin types SiO2 Al2O3 K2O TiO2 Fe2O3 CaO SO3 NiO Na2O MgO P2O5 ZrO2
M 90.8190 7.8266 0.4131 0.2922 0.2740 0.1165 0.1127 - 0.0805 0.0410 0.0112 0.0032
Z 87.3488 10.7847 0.4263 0.4198 0.6610 0.1791 - 0.0050 0.0760 0.0619 0.0325 0.0047
表1  两种硅土的XRF测试结果
图3  Z硅土涂层的截面形貌
Blank coating sample M coating sample Z coating sample
Thickness/μm 24±2 26±2 26±1
Gloss/60° 146 139 150
Pendulum hardness 0.55 0.63 0.78
Adhesion/Grade 1 1 1
Flexibility/mm 1 1 1
Impact resistance/kgcm 50 50 50
表2  空白涂层试样和硅土涂层试样涂层的光学和力学性能
Coatings The average value
of abrasion/mg
Blank coating sample 14
M coating sample 6
Z coating sample 2
表3  空白涂层试样和硅土涂层试样的耐磨性能数据
图4  空白涂层试样和硅土涂层试样耐磨试验后SEM照片
图5  空白涂层试样和硅土涂层试样盐雾试验300 h后的照片
Coatings The average value of rust
expanding width/mm
Blank coating sample 2.7
M coating sample 1.2
Z coating sample 0.9
表4  空白涂层试样和硅土涂层试样的锈蚀扩展宽度
图6  空白涂层试样和硅土涂层试样在浸泡时间内的Bode图
图7  涂层浸泡不同时间的等效电路图
图8  空白涂层和硅土涂层电阻随浸泡时间的变化
图9  涂层吸水率随浸泡时间的变化
图10  硅土涂层耐腐蚀机理模型
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