摘要
采用交流阻抗(EIS)研究了氯化橡胶涂层在紫外光照射和盐水浸泡共同作用下防护性能的变化。用傅里叶变换红外光谱(FT-IR)研究了腐蚀过程中涂层主要基团的变化。结果表明,在腐蚀过程中氯化橡胶主要发生了C—H键断裂,同时生成亲水基团—OH。用扫描电镜(SEM)观察了涂层表面形貌的变化,分析表明氯化橡胶在老化条件下在很短的时间内就发生"喷霜"现象,而这种"喷霜"现象是导致氯化橡胶涂层在极短时间内失效的最主要原因。
The protection capability of chlorinated rubber coating under theffect of combined ultraviolet irradation/salt brine immersion is studied by means of electrochemical impedance spectrnm （EIS）, Fourier transform infrared spectrum （FT-IR） and SEM. The results show that the breakdown of C-H bonds occurs in chlorinated rubber coating during the corrosion/ageing process and hydrophilic OH group is formed simultaneously. The ultraviolet irradiation plays a more important role than salt brine dipping does in the degradation of the coating. The “blooming” behavior on surface of the chlorinated rubber coating is observed for a short time of ageing, which results in many pores in the film, leading to quick failure of the film.
出处
《涂料工业》
CAS
CSCD
2007年第B07期44-49,共6页
Paint & Coatings Industry
关键词
氯化橡胶涂层
浸泡
老化
失效
chlorinated rubber film
corrosion
ageing
failure
