| 摘要: |
| 对艇用铝材LF4及其它多种管系金属材料进行静态和动态条件下的自然电位、自然腐蚀率、电化学性能、电偶腐蚀行为等进行多方面的腐蚀试验,得出这些材料在静态和动态海水中的腐蚀性能指标以及变化规律。随着海水流速的增加,LF4铝合金耐蚀性迅速降低。LF4在天然海水中有钝化的趋势,但是钝化膜不完整易破坏。在与其它常用管系金属材料组成的电偶对中,LF4均作为阳极受到加速腐蚀。 |
| 关键词: LF4铝合金 腐蚀性能 海水 |
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| Corrosion performance of LF4 aluminum alloy in seawater |
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| Abstract: |
| In this study, corrosion of LF4 aluminum alloy in quiescent and flowing seawater was revealed in natural potential, natural corrosion rate and galvanic corrosion. Through measuring and comparing their polarize curves, the corrosion mechanism and electrochemical capability of this material in quiescent and flowing seawater are summarized. It has hsown that the average corrosion rates of LF4 aluminum alloy are augment along with increasing flowing rate increasing, the galvanic corrosion rate was affected much greater in flowing seawater than in quiescent seawater, the natural potentials are negative 50～60 mV than in quiescent state. The relationship between cathodic polarization and the rate of flowing seawater is dicussed in this paper. |
| Key words: aluminum alloy LF4 corrosion feature seawater |
