喷瓷管道瓷层与金属的密着行为研究  

Bonding behaviors between enamel coating and base metal for sprayed porcelain pipe

作　　者：王勇[1] 韩涛[1] 

机构地区：[1]石油大学机电工程学院,山东东营257061

出　　处：《石油大学学报（自然科学版）》2004年第2期79-81,共3页Journal of the University of Petroleum,China(Edition of Natural Science)

基　　金：高等学校骨干教师资助计划项目 (K0 0 0 3 0 7A)

摘　　要：采用火焰喷熔工艺在Q2 35金属管道表面喷熔耐蚀的玻璃釉料 ,对瓷层与金属的密着行为进行了研究。喷瓷层与金属的密着是热喷玻璃釉料熔体在基体表面上润湿、铺展和界面反应形成的。试验结果表明 ,热喷釉料在瓷层与金属界面上发生了一系列复杂的物理化学反应 ,形成了一个厚度约 5 0 μm的过渡层 ,铁、镍等元素在界面上发生富集。玻璃熔体侵蚀基体金属 ,溶解表面氧化物 ,在瓷层与金属界面上生成大量的氧化物结晶相。过渡层中岛状、块状的Fe-Ni合金以金属键与基体连接 ;玻璃相通过Fe—O和Si—O键与基体连接 ;玻璃熔体侵蚀基体表面 ,使其变得粗糙、凹凸不平 ,形成机械镶嵌连接。这 3方面共同作用形成了密着层 。The anti-corrosion glass frit was sprayed on the surface of metallic pipeline by flame spraying technique. The bonding behaviors between enamel coating and base metal were studied. The bonding layer between the enamel coating and the base metal was formed by means of wetting,spreading and reaction of the molten frit on the metal surface. The test results show that a series of complicated physical and chemical reactions take place on the interface of metal and enamel coating,which causes elements of Ni and Fe concentrated on the interface. The glass smelt can erode the base metal and dissolve the surface oxides,then many crystalline phases are produced. A transition layer about 50μm in width is produced on the interface where Fe-Ni alloy exists as the shapes of island and clump and is joined with the base metal by metallic bond. The glass phase and the base metal are joined by bonds of Fe-O and Si-O. The glass smelt erodes the surface of base metal and make it rough. The glass phase joins with the base metal by surface scarfing. The bonding layer is generated under the action of the above three factors,through which the enamel coating is adhered with the base metal by means of the bonding layer.

关 键 词：喷瓷管道 瓷层 金属 密着行为 密着力 热震法 火焰喷熔工艺 玻璃釉料 

分 类 号：TE988.2[石油与天然气工程—石油机械设备] TG174.453[金属学及工艺—金属表面处理]