Cr_2O_3/KH-550改性绢云母及其对环氧涂料防腐性能的影响  

Sericite modified by Cr_2O_3/KH-550 and its effection on the anticorrosion properties of epoxy resin coating

作　　者：高延敏[1] 袁浩[1] 王晓艳[1] 

机构地区：[1]江苏科技大学材料科学与工程学院,江苏镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2012年第1期31-34,共4页Journal of Jiangsu University of Science and Technology:Natural Science Edition

摘　　要：采用有机-无机复合改性方法对片状绢云母表面进行了改性,考察了改性绢云母对环氧涂料防腐性能的影响.采用扫描电镜(SEM)、X—射线衍射(XRD),电化学工作站等对改性绢云母表面的物理化学性能进行了表征.结果表明:绢云母表面的防腐性能得到了改善,绢云母表面引入一层Cr2O3,当Cr2O3的用量为绢云母的60%时改性效果最佳,用KH-550进一步改性后的绢云母疏水亲油性比单独用Cr2O3改性的绢云母有了提高,而且腐蚀电位明显提高,自腐蚀电流大大减小,说明该涂层可使腐蚀速度减小,有较好的保护作用.Sericite has some shortcomings including hydrophilic dredging oil, easy reunion and difficult wetting and distracting in organic coating. By using ganic-inorganic compound, sericite is modified, and its influence on anticorrosion properties of epoxy painlL is further investigated. Moreover, the physical and chemical characteristics of surface-modified sericite are analy=,ed by scanning electron microscope （SEM）,X-ray diffraction （XRD） and electrochemical analysis. The results show that the anticorrosion performance of sericite surface is improved, and it is equably covered with a layer of Cr2O3. When the dosage of chromic nitrate accounts for 60% of sericite, the wrapping effect is good. The hydrophilic oleophobic characteristics of sericite that is coated with KH -550 again after being modified with Cr2O3 is enhanced largely. Also, corrosion potential is improved obviously, and corro- sion current is decreased greatly. This means that the coating reduces the corrosion speed and has a good protec- tion.

关 键 词：绢云母 改性 防腐 

分 类 号：TQ630[化学工程—精细化工]