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  • wuweifeng214

    第11楼2006/02/18

    确实是个好东西

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  • chenxin72

    第12楼2006/10/01

    好宝贝,收藏了,谢谢!

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  • bettyhui

    第13楼2006/10/13

    Thank you very much!!!

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  • firstli

    第14楼2006/10/14

    看不懂啊。怎么搞 啊

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  • junchenyi

    第16楼2006/10/26

    为什么我把两个文件都下了,还说需要压缩卷啊,具体怎么解压,谁能告诉我呀?

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  • zslhnxx

    第17楼2006/10/26

    在电化学研究中, 经常需要使用许多由被研究
    对象制作成的金属电极, 而这些电极往往没有成品
    出售, 这就需要研究者自己动手来做一些电极, 本文
    以一种用于电化学腐蚀研究的黄铜电极的制作为
    例, 介绍金属电极的制作方法。本方法的特点是: 方
    法简单、材料便宜易寻且为废物利用, 制作出的电极
    结构小巧, 质量上能够很好地满足研究工作的需要。

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  • zslhnxx

    第18楼2006/10/26

    Billions of dollars are spent each year on the prevention of iron corrosion. Corrosion converts
    steel, an extremely strong, cheap and versatile building material composed of iron and carbon,
    into brittle iron oxides known as rust. The problem is compounded as rust tends to scale off the
    surface of iron, exposing more iron to the oxidising environment. This is in contrast to some
    other metals, such as aluminium where an oxide coating offers a degree of passivation,
    preventing further corrosion.
    When iron is placed into a deoxygenated acidic solution, the following reactions are established.

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  • zslhnxx

    第19楼2006/10/26

    However, jcorr and hence the rate of corrosion per unit area can be determined indirectly using
    potentiodynamic polarization, the limiting form of the Butler-Volmer equation (Equation 2.1)
    and Tafel plots.
    j = j
    0
    e
    (1-􀀁)f􀀂- e -􀀁f􀀂 { }
    where f =
    nF
    RT
    , 􀀂 = E
    applied
    - E
    corr
    􀀁 = transfer coefficient
    The first exponential term in Equation 2.1 corresponds to the anodic component whilst the
    second is the cathodic component.
    ……(2.1)

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  • zslhnxx

    第20楼2006/10/26

    However, jcorr and hence the rate of corrosion per unit area can be determined indirectly using
    potentiodynamic polarization, the limiting form of the Butler-Volmer equation (Equation 2.1)
    and Tafel plots.
    j = j
    0
    e
    (1-􀀁)f􀀂- e -􀀁f􀀂 { }
    where f =
    nF
    RT
    , 􀀂 = E
    applied
    - E
    corr
    􀀁 = transfer coefficient
    The first exponential term in Equation 2.1 corresponds to the anodic component whilst the
    second is the cathodic component.
    ……(2.1)

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