Abstract:
The failure process of acrylic coating exposed in both 3.5% sodium chloride solution and uv radiation was studied with the methods of electrochemical impedance spectrum(EIS), SEM and FT-IR.The results showed that UV radiation obviously accelerated decreasing rate of the coating impedomce in sodium chloride solution. UV radiation also accelerated water penetration into acrylic coating in 3.5% sodium chloide solution, but in saturated solution, water uptake values were affected slightly. According to FT-IR analysis, the breakdown of C=O and C-O-C bonds occurred in acrylic coating under both conditions, but the UV radiation obviously accelerated the degradation of coatings film.
Key words:
acrylic coating,
sodium chloride,
UV radiation,
EIS
摘要： 利用电化学阻抗谱、SEM和红外研究了丙烯酸涂层在紫外光照射和 3.5%氯化钠溶液浸泡联合作用下的失效过程。在3.5%氯化钠溶液浸泡 －紫外光照射联合作用下，丙烯酸涂层阻抗值降到106 Ω·cm2所用时间比浸泡单独作用下缩短约3/5。与单独浸泡作用相比，浸泡－紫外光照射联合作用会导致水在丙烯酸涂层中的渗透过程明显加速，但对饱和时的水含量影响不大。红外光谱解析表明，在单独浸泡作用和浸泡 －紫外光照射联合作用两种环境下，丙烯酸涂层中的酯羰基和C-O-C键都发生裂解，但紫外光照射明显加速了涂层的降解过程。
关键词:
丙烯酸涂层,
氯化钠,
紫外光照射,
电化学阻抗谱
Jia Fangke, Cao Jingyi, Tang Yuming, Zuo Yu. Failure Process of Acrylic Ship Hull Coating Under Combined Immersion and UV Radiation[J]. Paint & Coatings Industry, 2010, 40(5): 66-70.
贾芳科１, 曹京宜２, 唐聿明１, 左 禹１. 丙烯酸船壳漆在盐水浸泡 －紫外光照射联合作用下的失效过程[J]. 涂料工业, 2010, 40(5): 66-70.