摘要
研究了钢桥面沥青混凝土铺装层下热喷锌防腐蚀涂层的腐蚀特征,并在此基础上提出锌涂层腐蚀导致沥青混凝土铺装层性能下降的理论假设模型。采用IM6ex电化学工作站研究了热喷锌涂层的腐蚀电位、腐蚀电流与时间的关系,涂层的极化特性,采用XRD分析了锌涂层的腐蚀产物。结果表明锌涂层腐蚀产物中存在大量ZnO和Zn5(CO3)2(OH)6,破坏了粘结层与锌涂层之间的粘结,起到裂纹源的破坏作用,使铺装层在载荷的作用下提前失效。
Corrosion properties of thermal sprayed Zinc coating under asphalt concrete pavement coat were studied.A theoretic model was set up to explain the reason for the electrochemical corrosion of thermal sprayed Zinc coating to reduce the capability of asphalt concrete coat.Relationship between potential and immersion time for coating,and polarization properties of the coating were studied with an IM6ex electrochemical workstation.Corrosion products were studied with XRD.A great lot of ZnO and Zn5(CO3)2(OH)6 wer...
出处
《腐蚀与防护》
CAS
北大核心
2007年第9期445-448,共4页
Corrosion & Protection
基金
江苏省自然科学基金项目(BK20050)
江苏省交通科技计划项目(06Y24)
关键词
钢桥面铺装
沥青混凝土
热喷锌
电化学腐蚀
粘接层
Steel bridge deck pavement
Asphalt concrete
Thermal sprayed Zinc
Electrochemical corrosion
Bond coat
