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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

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张际标 1   王佳 2   王燕华 2   姜应律 2  
文摘 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 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 中国腐蚀与防护学报 ,2008,28(3):151-154 【核心库】
关键词 微液滴 ; 干湿交替 ; 电化学极化 ; 大气腐蚀
地址

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

语种 中文
文献类型 研究性论文
ISSN 1005-4537
学科 金属学与金属工艺
基金 国家自然科学基金
文献收藏号 CSCD:3306580

参考文献 共 10 共1页

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9.  张际标. 微液滴现象与大气腐蚀-I. 微液滴的形成与扩展,2006,26(4):207-210 被引 1    
10.  张际标. 微液滴现象与大气腐蚀-Ⅱ. 微液滴的电化学表征,2006,26(5):282-285 被引 1    
引证文献 2

1 郭孟秋 无机盐沉积下7B04铝合金表面微液滴形成研究 航空材料学报,2010,30(4):48-52
被引 1

2 罗睿 碳钢大气腐蚀机制及锈层演化研究 腐蚀科学与防护技术,2013,25(5):433-436
被引 1

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