CAJ | 학술논문

以甲基丙烯酸十二氟庚酯和乙烯基三甲氧基硅烷为功能单体，采用种子乳液聚合法合成氟硅丙烯酸酯乳液(氟硅)，然后将钠基蒙脱土(钠土)分散于其中，制成复合乳胶涂层并涂覆在Q235钢上。研究了乳液种类和钠土用量对涂层防腐性的影响。采用红外光谱(FT-IR)、透射电子显微镜(TEM)和扫描电子显微镜(SEM)表征了氟硅丙烯酸酯乳液和涂层。通过极化曲线、交流阻抗测量和中性盐雾试验探讨了复合涂层的耐腐蚀性。结果表明，乳胶粒子呈核壳结构，涂层连续、致密，钠土在涂层中分散均匀。当钠土用量为4%时，复合涂层的耐蚀性最好，水接触角达到102.4°，附着力为0级，电化学阻抗达到104.4?，腐蚀速率仅为4.3×10?5 mm/a，盐雾试验240 h后膜下金属未发生腐蚀扩散。
이갑기병희산십이불경지화을희기삼갑양기규완위공능단체，채용충자유액취합법합성불규병희산지유액(불규)，연후장납기몽탈토(납토)분산우기중，제성복합유효도층병도복재Q235강상。연구료유액충류화납토용량대도층방부성적영향。채용홍외광보(FT-IR)、투사전자현미경(TEM)화소묘전자현미경(SEM)표정료불규병희산지유액화도층。통과겁화곡선、교류조항측량화중성염무시험탐토료복합도층적내부식성。결과표명，유효입자정핵각결구，도층련속、치밀，납토재도층중분산균균。당납토용량위4%시，복합도층적내식성최호，수접촉각체도102.4°，부착력위0급，전화학조항체도104.4?，부식속솔부위4.3×10?5 mm/a，염무시험240 h후막하금속미발생부식확산。
A fluorine-silicon-acrylate emulsion was synthesized by seed emulsion polymerization using dodecafluoroheptyl methacrylate and vinyltrimethoxysilane as monomers. Sodium montmorillonite (Na-MMT) was dispersed in the fluorine-silicon-acrylate emulsion for preparing a composite emulsion coating for Q235 steel. The influences of emulsion type and Na-MMT content on anticorrosion properties of the coating were studied. The fluorine-silicon-acrylate emulsion and coating were characterized by Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The corrosion resistance of the composite coating was examined by polarization curve measurement, electrochemical impedance spectroscopy, and neutral salt spray test. The results showed that the emulsion particles possess obvious core-shell structure and the composite coating is continuous and compact with well-dispersed Na-MMT. The composite emulsion coating obtained with 4%Na-MMT has optimal anticorrosion performance with a water contact angle of 102.4°, adhesion strength of 0 grade, electrochemical impedance 104.4?, and corrosion rate 4.3 × 10?5 mm/a. There is no corrosion propagation on steel surface beneath the coating after neutral salt spray test for 240 h.