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从双相β相铜中选择性溶解和,在低和高导电性的水中

Ming-Han Tsai¹, Shu-Ju Chao², Cai-Lin Luo¹

¹Institute of Environmental Engineering, National Yang Ming Chiao Tung University, Hsinchu, 300, Taiwan.

|March 29, 2024

概括

这项研究表明,比较高的β相分数的黄铜在自来水中呈现出泄漏的增加,影响水质. 了解这些金属溶解模式对于水利公司管理黄铜组件至关重要.

科学领域:

材料科学材料科学材料科学
环境科学环境科学
电化学电化学电化学

背景情况:

黄铜水表在水分系统中很常见.
了解从黄铜中炼金属对于确保水质和公共健康至关重要.
之前的研究还没有完全探讨长期的,时间依赖的选择性金属溶解的黄铜与不同的β相分数.

研究的目的:

在各种自来水条件下研究不同β相分数的黄铜的选择性金属出.
为了确定黄铜的长期,时间依赖的溶解行为.
为水利公司提供见解,以预测黄铜水表的金属释放.

主要方法:

进行了一项为期201天的沉浸实验,使用了三个具有明显β相分数的商业黄铜样品 (51%,43%,39%).
实验是在低导电性和高导电性自来水 (LCTW和HCTW) 中进行的.
测量了腐蚀潜力,极化阻力和金属漏率 (Zn,Pb,Cu). 分析了均腐蚀 (UC) 和电腐蚀 (GC) 的机制.

主要成果:

铜51 (51%β相) 在LCTW中显示出最负的腐蚀潜力和最低的极化阻力.
黄铜51在LCTW和HCTW中表现出最高的浸出率,其次是黄铜43和黄铜39,在LCTW和HCTW中.
和铜的出明显低于. 在LCTW中,均腐蚀转向了电腐蚀,随着时间的推移,增加了Zn/Cu选择性水系数 (S_Zn/Cu).
在HCTW中,S_Zn/Cu值要高得多 (300-1000),由于ZnO层的形成,更早地过渡到电腐蚀.

结论:

铜组成,特别是β相分数,显著影响选择性浸出.
龙头水的导电性和腐蚀机制 (UC转换为GC) 在金属溶解速率和模式中起着关键作用.
这些发现有助于水利公司评估和管理来自黄铜水表的潜在金属污染.

关键词:

贝塔阶段贝塔阶段贝塔阶段黄铜铜是什么意思黄铜铜是什么意思导电性导电性导电性导电性选择性腐蚀是一种选择性腐蚀.这是自来水,是自来水.

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