Morphologies of passivated hot galvanizing plate before and after neutral salt spray corrosion test in various times were analyzed by optical microscopy and SEM/EDS,and the effects of surface morphologies,micro-zone components and spangle appearance on its corrosion resistance were studied.
采用光学显微镜和扫描电子显微镜(SEM/EDS)对热镀锌钝化板锌花形貌及不同时间中性盐雾试验后热镀锌钝化板锌花的腐蚀形貌进行了分析,研究了热镀锌钝化板表面形态、微区成分及锌花形貌对其耐蚀性的影响。
In this paper,current research status of spangle is reviewed,including appearance of spangle,the correlation between the shape of spangle and the crystallographic orientation and the effect of alloying ad- ditions as well as the influence of the spangle on the corrosion resistance and mechanical properties of the coating.
由大晶粒组成的锌花是热浸锌镀层有别于其它镀层的显著特征,综述了热镀锌钢上锌花的研究现状,包括锌花的外观形貌、形貌与锌晶体学位向的关系、合金添加剂的作用以及锌花对热浸锌镀层腐蚀性能和力学性能的影响。
It is proved that the galvanizing process is independent of Pb content variation in the zinc bath and change of spangle size on the sur- face of the galvanized sheet,which takes on an exponential curve is a function of Pb content.
结果表明,改变锌液中的铅含量不影响镀锌工艺,随着铅含量的改变,镀锌板表面锌花尺寸呈指数曲线变化,当锌液中不加铅(无铅)时,镀锌板表面呈无锌花状,其耐蚀性和涂装性都优于常规含铅(0。
Analysis of some general defects for non-spangle galvanize production
无锌花镀锌产品常见缺陷及分析
Introduced the main producing process and quality control of non-spangle galanize,analyzed the reasons and advanced some resolvents for some general defects.
介绍了影响无锌花产品表面质量的工艺控制要点,分析了几种常见缺陷的产生原因,并提出相应的改进措施。
Solvent-thermal technique was used to synthesize cauliflower-like ZnO nanopowders with Zn(NO3)2·6H2O and NaOH as the raw materials.
6H2O和NaOH为原料,采用溶剂热合成技术制备了菜花状氧化锌纳米粉体,采用X射线衍射仪、扫描电镜和X-射线光电子能谱仪等对产物的物相、微观形貌和表面元素状态进行了表征,结果表明产物属于六方晶系的ZnO,呈规则的菜花状,分散性好,粒径90～100 nm,粉体表面存在大量的吸附氧。