采用傅里叶红外光谱(FTIR)、扫描电子显微(SEM)及电化学交流阻抗(EIS)技术,研究了环氧涂层在两种循环加速腐蚀(湿热-盐雾-疲劳和湿热-紫外-盐雾-疲劳)中的表面形貌、化学组成以及电化学阻抗特性.无紫外的循环加速腐蚀后涂层中心部分表面形貌无明显的变化,边缘部分涂层8个周期之后起泡破裂,破裂处出现了涂层下基体的腐蚀;有紫外的循环加速腐蚀过程中,紫外照射之后涂层表面粗糙度增加,出现粉化、失光现象,随循环加速腐蚀周期的增多涂层表面开始出现裂纹,且裂纹数量逐渐地增多.FTIR研究表明,无紫外的循环加速腐蚀后涂层结构无变化,而有紫外的循环加速腐蚀后涂层结构发生了明显的变化,高分子链断裂,O-H,C-H,C=C键及苯环等官能团消失.涂层在有紫外的循环加速腐蚀8个周期之后的电化学阻抗值仅为无紫外的1/2.
参考文献
| [1] | NGUYEN T N,HUBBARD J B,McFADDEN G B .A mathematical model for the cathodic blistering of organic coatings on steel immersed in electrolytes[J].J Coat Tech,1991,63(794):43-52.,1991. |
| [2] | HU J W,LI X G,GAO J,et al .Ageing behavior of acrylic polyurethane varnish coating in artificial weathering environments[J].Progress in Organic Coatings,2009,65(4):504-509.,2009. |
| [3] | 庞然,左禹,唐聿明,熊金平,初必旺.环氧/聚氨酯涂层在4种环境中失效行为的EIS[J].化工学报,2010(10):2656-2661. |
| [4] | ALLIBAND A,LENZ D W,DUPOIS J,et al .Epoxy paint failure in B52 fuel tanks part I-preliminary development of a model for the process[J].Progress in Organic Coatings,2006,56(4):285-296.,2006. |
| [5] | 郑天亮,张华,王轩,王月红,张璋.用EIS法研究丙烯酸聚氨酯涂层的光老化性能[J].航空学报,2007(03):714-718. |
| [6] | GEISS O,CACHO C,MORENO J B,et al .Photocatalytic degradation of organic paint constituents-formation of carbonyls[J].Building andEnvironment,2012,48 |
| [7] | 杨洪源,刘文珽.民机结构外露关键部位涂层加速腐蚀环境谱研究[J].航空学报,2007(01):90-93. |
| [8] | 管琪,刘慧丛,朱立群,李卫平,刘建中,叶序彬.2524铝合金包铝层在模拟油箱积水环境中结垢及其对腐蚀行为的影响[J].材料工程,2013(05):11-15,22. |
| [9] | 哈恩华,纪建超,孙士彬,钟艳莉.飞机透明件用光固化有机-无机杂化耐磨涂层的研究[J].航空材料学报,2012(04):75-79. |
| [10] | 吕平,陈国华,黄微波.聚天冬氨酸酯聚脲涂层加速老化行为研究[J].四川大学学报（工程科学版）,2007(02):92-97. |
| [11] | 周和荣,揭敢新,马坚.聚酯粉末涂层在模拟海洋环境中的腐蚀行为[J].材料工程,2013(09):48-53,59. |
| [12] | YANG X F,TALLMAN D E,BIERWAGEN G P,et al .Blistering and degradation of polyurethane coatings under different accelerated weathering tests[J].Polymer Degradation and Stability,2002,77 |
| [13] | HU J W,LI X G,GAO J,et al .Ageing behavior of acrylic polyurethane varnish coating in artificial weathering environments[J].Progress in OrganicCoatings,2009,65 |
| [14] | KOTNAROWSKA D .Influence of ultraviolet radiation and aggressive media on epoxy coating degradation[J].Progress inOrganic Coatings,1999,37:149-159.,1999. |
| [15] | 方丙炎,韩恩厚,王俭秋,朱自勇,柯伟,胡建平,徐志刚.老化温度和老化时间对环氧酯漆涂层性能的影响[J].金属学报,2003(05):533-540. |
| [16] | 耿舒,高瑾,李晓刚,赵泉林.丙烯酸聚氨酯涂层的紫外老化行为[J].北京科技大学学报,2009(06):752-757. |
| [17] | ABREU C M,IZQUIERDO M,KEDDAM M,et al .Electrochemical behaviour of zinc-rich epoxy paints in 3% NaCl solution[J].Electrochimica Acta,1996,41(15):2405-2415.,1996. |
| [18] | ZHANG J T,HU J M,ZHANG J Q,et al .Studies of water transport behavior and impedance models of epoxy-coated metals in NaCl solution by EIS[J].Progress in Organic Coatings,2004,51(2):145-151.,2004. |
| [19] | 张鉴清,曹楚南.电化学阻抗谱方法研究评价有机涂层[J].腐蚀与防护,1998,(3):99-104.ZHANG Jian-qing,CAO Chu-nan.Study and evaluation on organic coatings by electrochemical impedance spectroscopy[J].Corrosion & Protection,1998,(3):99-104.,1998. |
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