表面技术2016，Vol.45Issue(3)：158-163,177,7.DOI:10.16490/j.cnki.issn.1001-3660.2016.03.026
SiO2微球负载BTA缓蚀剂型自修复耐蚀涂层的制备及性能研究
Preparation and Properties of SiO2 Microspheres Loading with BTA Inhibitor Type Self-healing Corrosion-resistant Coating
董培林1
作者信息
- 1. 中石化胜利分公司孤东采油厂，山东 东营257237
- 折叠
摘要
Abstract
ABSTRACT:Objective In order to study the corrosion resistance and anti-corrosion mechanism of the self-healing coating pre-pared by adding corrosion inhibitors loaded mesoporous SiO2 microspheres into 7537 polyurethane. Methods The benzotriazole ( BTA) was loaded into SiO2 microspheres by negative pressure-impregnation method. The morphology and crystal structure of SiO2 microspheres and loading content of BTA were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and thermogravimetric analysis ( TGA) . The effects of SiO2 , BTA, SiO2-BTA addition on the corrosion resistance of the coatings were studied by potentiodynamic polarization curve measurement and electrochemical impedance spectroscopy ( EIS) . Results SEM images showed the size of SiO2 was approximately 1 μm. TGA showed the loading content of BTA was 32. 38 wt%. According to immersion test, corrosion occurred on all kinds of coatings in the progress of immersion except for the PU SiO2/BTA coating sam-ples. The electrochemical polarization curve and EIS results showed that PU+SiO2/BTA coating samples always had the lowest cur-rent density and relatively high impedance values. Conclusion Porous SiO2 microspheres could store the BTA. When the coatings were damaged, BTA could release, diffuse and absorb on the defect regions, granting this coating a certain self-healing function. In addition, SiO2 microspheres could improve the coating density. Therefore, the addition of BTA loaded porous SiO2 microspheres led to coating with the best corrosion resistance and a certain self-healing function.关键词
涂层/缓蚀剂/浸泡/多孔二氧化硅微球/阻抗/自修复Key words
coating/corrosion inhibitor/immersion/mesoporous SiO2 microspheres/impedance/self-healing分类
矿业与冶金引用本文复制引用
董培林..SiO2微球负载BTA缓蚀剂型自修复耐蚀涂层的制备及性能研究[J].表面技术,2016,45(3):158-163,177,7.
