老化温度和老化时间对环氧酯漆涂层性能的影响  

EFFECT OF AGING TEMPERATURE AND TIME ON THE PERFORMANCE OF EPOXY COATING

作　　者：方丙炎[1] 韩恩厚[1] 王俭秋[1] 朱自勇[1] 柯伟[1] 胡建平[2] 徐志刚[3] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110016 [2]北京航空航天大学材料科学与工程学院,北京100083 [3]空军第一研究所,北京100076

出　　处：《金属学报》2003年第5期533-540,共8页Acta Metallurgica Sinica

基　　金：国家重点基础研究发展规划资助项目 G19990650

摘　　要：运用电化学阻抗谱(EIS)和Fourier变换红外光谱研究了经过不同老化温度和老化时间处理的含锌铬黄防锈颜料的环氧酯漆在3.5％NaCl溶液中的阻抗谱特征,根据Fourier变换红外光谱和电化学阻抗谱中第二个时间常数出现的快慢及高频收缩情况来判断涂层的耐蚀性能,进而筛选老化工艺。结果表明,当老化温度为80℃和140℃,老化时间为3周时,涂层耐蚀性较好。其老化过程实际是有机高分子进一步发生交联反应和分子键破坏相互竞争的过程。同时提出了锌铬黄防锈颜料的作用机理。The electrochemical impedance spectroscopy (EIS) features and the resistance to corrosion of an epoxy coating containing the pigment of zinc chrome yellow have been studied with the aid of EIS and Fourier transform infrared spectroscopy (FTIR) analysis. The resistance to corrosion of coating, even the selection of aging technics, can be evaluated based on the time of the emergence of the second time constant and the shrink of the capacitive arc in the EIS spectra and FTIR spectra. The coating was treated under the conditions of different aging temperatures and times. It is revealed that when the coating was aged at 80 degreesC and 140 degreesC in the period of 3 weeks, there is very good resistance to corrosion. The process of aging is the one that the further reaction of organic macromolecule competes with the breakdown of the molecule bond. Moreover, the mechanism for the anti-rust pigment of zinc chrome yellow is proposed.

关 键 词：锌铬黄 涂层性能 电化学阻抗谱 老化 

分 类 号：TG174[金属学及工艺—金属表面处理]