文档介绍：江苏科技大学
硕士学位论文
金属用水性环氧涂料及其缓蚀剂的研究
姓名:孟祥玲
申请学位级别:硕士
专业:材料学
指导教师:高延敏
20070315
摘要
金属用水性环氧涂料及其缓蚀剂的研究
摘要
金属防腐蚀的方法一直是研究的热点,而水性涂料由于其无毒、无味、环保等优
点也越来越受到重视。所以将水性涂料用于金属防腐领域具有十分重要的研究意义和
应用价值。本文自行设计制备了水性环氧树脂和水性环氧防腐涂料,并对涂层的耐蚀
性进行了研究。
我们选用十二烷基磺酸钠充当乳化剂,采用相反转法制备了环氧树脂乳液,研究
了乳液在制备过程中乳化剂用量、乳化温度对其平均粒径和稳定性的影响,用光学显
微镜表征了其粒径形态。最终确定了乳化剂的最佳用量和乳化条件,当乳化剂浓度为
1wt%,乳化温度为 8℃时,乳液粒径最小稳定性最好。
将硬脂酸盐类长链缓蚀剂作为包覆剂对具有优良性能的绢云母粉进行表面包覆改
性,用扫描电镜观察了绢云母粉包覆前后的表观形貌变化,并计算了包覆量。通过交
流阻抗谱研究了包覆后绢云母粉对涂层耐蚀性的影响。结果表明,包覆后绢云母粉的
加入使涂层阻抗值明显增大,有效的降低了水在涂层中的扩散,提高了涂层的防腐蚀
性能。为了弄清硬脂酸盐的包覆规律,我们通过热重分析技术对硬脂酸、硬脂酸锌、
硬脂酸钙和硬脂酸钡这四种缓蚀剂的包覆行为进行了深入的研究。结果表明,这四种
缓蚀剂分别具有不同的包覆规律,硬脂酸和硬脂酸锌的包覆情况可用 Langmuir 方程进
行描述,即当浓度达到某一值时包覆量为最大值;硬脂酸钙的包覆曲线成共轭螺旋线
状;硬脂酸钡的包覆曲线则呈线性函数状,即包覆量随着包覆浓度的增加而线性增加。
最后研究了新型无机缓蚀剂复合磷钛粉的缓蚀机理及其用量对耐蚀性的影响。

关键词:水性环氧涂料;防腐;交流阻抗谱;包覆

I
Abstract
Study on the waterborne epoxy resin coatings and the corrosion inhibitor
Abstract
The methods of metal anti-corrosion are being studied for a long time. Waterborne
paints attract so much attention due to their process non-noxious, odorless, no-harm to the
environment and safe characteristic. Well, it is very valuable to research the water-based
corrosion resistant coatings. In this paper water-based epoxy resin and water-based epoxy
resin coatings are prepared. The anti-corrosion performance of the coatings is studied.
We prepare the epoxy resin latex with SES as the emulsifier in the way of phase
inversion. The influence of the emulsifier content and emulsifying temperature on average
particle size and stability are investigated. Light microscope is used to characterize the
particle morphology. We finally get the optimum condition in which the latex properties are
best that is the emulsifier content of 1% and emulsifying temperature at 80℃.
The stearates, a kind of long-chain inhibitor are used to surface coat the mica powder
which has good properties. The morphology of the coated and uncoated mica powder are
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