微液滴现象与大气腐蚀Ⅲ.干湿交替下微液滴的扩展行为
MICRO-DROPLETS PHENOMENON AND ATMOSPHERIC CORROSION Ⅲ. SPREADING BEHAVIORS OF MICRO-DROPLETS UNDER CYCLIC WET-DRY CONDITIONS
查看参考文献10篇
文摘
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采用在线显微技术考察了25℃、相对湿度50%和90%的干湿交替作用下,有无外部极化时微液滴的形成和扩展规律.结果表明,没有施加外部极化,干湿循环次数对微液滴的形成和扩展影响不大.在极化状态下,随着干湿循环的进行,微液滴覆盖区交替收缩和扩张,极化电流和极化电阻发生脉冲性变化,极大极化电流随干湿交替次数的增加而递增,极大极化电阻则随干湿交替的进行而减小.在干湿交替作用下,微液滴的扩展与腐蚀电流之间相互影响、相互促进. |
其他语种文摘
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Under the cyclic wet-dry conditions of 50% RH and 90% RH at 25 ℃,the spreading behaviors of micro-droplets were investigated in situ with the stereomicroscope with and without the electrochemical polarization.The results indicated that there was an unobvious influence of the wet-dry cycles on the formation and spreading of micro-droplets in a condition without the electrochemical polarization.Under the external polarization,with the advance of the wet-dry cycles,the areas covered with micro-droplets alternately expanded and dwindled,and the polarization current Ip and polarization resistance Rp changed impulsively.The maximum of Ip in each cycle increased gradually with the increase of the wet-dry cycles and the corresponding maximum of Rp followed a reverse changing rule.Under cyclic wet-dry conditions,it showed a closed relation between the spreading of micro-droplets and corrosion current.They were influenced and promoted with each other. |
来源
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中国腐蚀与防护学报
,2008,28(3):151-154 【核心库】
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关键词
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微液滴
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干湿交替
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电化学极化
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大气腐蚀
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地址
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1.
广东海洋大学海洋资源与环境监测中心, 湛江, 524088
2.
中国海洋大学化学化工学院, 山东, 青岛, 266003
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1005-4537 |
学科
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金属学与金属工艺 |
基金
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国家自然科学基金
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文献收藏号
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CSCD:3306580
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