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黑变
    The effect of impurity pb2+ in the electrolyte on the black patina formation on galvanized sheet surface and the properties of the coatings have been investigated by SEM, XRD, XPS and humidity cabinet tests.
    采用实验室模拟的方法,就Pb2+对电镀锌钢板黑变现象的影响进行了研究,同时利用SEM、XRD、XPS及电化学测试方法对镀锌层的特性和表面膜结构进行了测试、分析。
    The results show that the Pb2+ concentration has great effect on black patina formation, and the black patina consists mainly of ZnO1-x.
    结果表明,Ph2+对电镀锌钢板黑变的影响极大; 黑变表面膜的主要成分是ZnO1-x,本文还讨论了Pb2+对电镀锌钢板黑变影响的机制。
    Abstract The composition and structure of black patina film on electrogalvanized steel sheets were studied by AES,XPS and small angle XRD. It was verified that the main constituents of the film were PbFe\-6O\-\{10\} and PbO\-2.
    采用XPS、小角度XRD、AES等测试手段对黑变膜的组成及影响因素进行了分析研究,确认PbFe6O10、PbO2等物质为黑变膜重要存在形式,铅、铁离子的存在对黑变膜有很大影响。
    In order to make clear the mechanism of that the chromate passivation film increases the corrosion resistance of the zinc coating and to study the black patina which is a kind of prime corrosion phenomenon, the dynamic regulation about the black patina of electrogalvanized steel sheets has been studied.
    为探索铬酸盐钝化膜提高锌镀层耐蚀性的机理和研究其发生黑变的初期腐蚀现象, 对电镀锌钢板黑变的动力学规律进行了研究。
    The rates of black patina formation chromated zinc plates were studied by surface lightness difference method and humidity cabinet test (HCT), under the conditions with and without illumination.
    在硫酸盐镀锌液中所得的含铅与不含铅的镀锌试片 ,经铬酸盐钝化后 ,通过湿热试验 (HCT)进行了黑变培养。
    It was found that lead ion can decrease the activation energy E a of black patina formation from about 34? kJ/mol to about 21? kJ/mol, and accelerates the rate of black patina.
    发现镀液中铅离子的存在使黑变反应的活化能Ea 从 34kJ/mol左右降低到 2 1kJ/mol左右 ,从而加速了黑变反应。
    Illumination decreases the E a by 0.5? kJ/mol, but also decreases pre exponential factor A to a great extent, and the total effects of illumination withhold the rate of black patina. [
    光照虽然使Ea 降低了 0 .5kJ/mol,但同时较大幅度地降低了指前因子A的值 ,总的作用结果是抑制了黑变的反应
    The electrochemical characteristics of lead based alloy anodes with different composition prepared by different way are researched for suppressing the black patina of galvanized steel sheets.
    为了防止铅系合金阳极引发电镀锌钢板黑变 ,对不同成分及不同制造方法得到的阳极进行了电化学性能研究。
 

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