| 溶液pH值对不锈钢亚稳态孔蚀行为的影响 |
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| 引用本文： | 龚小芝,肖娟,左禹,赵景茂,熊金平. 溶液pH值对不锈钢亚稳态孔蚀行为的影响[J]. 北京化工大学学报(自然科学版), 2002, 29(4): 29-31. DOI: 10.3969/j.issn.1671-4628.2002.04.009 |
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| 作者姓名： | 龚小芝 肖娟 左禹 赵景茂 熊金平 |
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| 作者单位： | 北京化工大学材料科学与工程学院,北京,100029 |
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| 基金项目： | 国家自然科学基金;59971005; |
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| 摘 要： | 用测试动电位的电流-时间曲线法研究了不锈钢在不同pH值的NaCl溶液中的亚稳态孔蚀行为.结果表明,随溶液pH值升高,316L不锈钢在NaCl溶液中的亚稳孔形核电位Em和孔蚀电位Eb均正移;不同NaCl浓度下,Em和Eb随溶液pH值的变化趋势基本一致.溶液pH值对亚稳孔形核数有明显影响,随pH值升高形核数降低.但pH值对亚稳态孔蚀过程的动力学参数,包括亚稳孔生长速度、峰值电流和平均寿命,均影响不大.
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| 关 键 词： | 亚稳态孔蚀 电流波动 316L不锈钢 |
Effect of pH value on metastable pitting behaviour of stainless steel |
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| GONG Xiao zhi XIAO Juan ZUO Yu ZHAO Jing mao XIONG Jin ping. Effect of pH value on metastable pitting behaviour of stainless steel[J]. Journal of Beijing University of Chemical Technology, 2002, 29(4): 29-31. DOI: 10.3969/j.issn.1671-4628.2002.04.009 |
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| Authors: | GONG Xiao zhi XIAO Juan ZUO Yu ZHAO Jing mao XIONG Jin ping |
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| Affiliation: | College of Materials Science &; Engineering, Beijing University of Chemical Technology, Beijing 100029 , China |
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| Abstract: | Metastable pitting behaviour of stainless steel in NaCl solutions with different pH values was studied by using a potentiodynamic polarization method. With the increase in pH value, the metastable pitting potential ( E m) and pitting potential ( E b) increase. The number of metastable pits decreases as the pH value of the solution increases. However, the pH value has little influences on the dynamic parameters such as the growth rate, peak current and average lifetime of metastable pits. These parameters are mainly affected by the potential. |
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| Keywords: | metastable pitting current fluctuation 316L stainless steel |
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