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Atmospheric corrosion of zinc Part 2: Marine atmospheres

机译:锌的大气腐蚀第2部分:海洋大气

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摘要

This paper summarises the results obtained in the MICAT (Mapa Ibero-Americano de Corrosão Atmosférica (Latin American Map of Atmospheric Corrosion)) atmospheric corrosion project (an Iberoamerican project on atmospheric corrosion, involving 14 countries and 75 atmospheric test sites) for zinc specimens exposed in the Latin American region for 1–4 years at 23 pure marine and 19 mixed marine (i.e. SO2 polluted) sites. The atmospheres at these sites were characterised climatologically and in terms of their pollution levels so that their corrosivity could be expressed in accordance with ISO standards. Morphological and chemical characterisation of the zinc corrosion product layers (ZCPLs) was performed using scanning electron microscopy coupled with energy dispersive spectrometry (SEM–EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and soluble salt evaluation techniques. The results obtained show that the corrosion rate of zinc is a function of both the chloride pollution level and the time of wetness. Some synergetic effects of Cl- and SO2 were demonstrated, although some special types of behaviour were also observed.
机译:本文总结了在MICAT(拉丁美洲大气腐蚀图Mapa Ibero-Americano deCorrosãoAtmosférica)大气腐蚀项目(涉及14个国家和75个大气测试地点的伊比利亚美洲大气腐蚀项目)中获得的结果。在拉丁美洲地区的23个纯海洋和19个混合海洋(即SO 2 污染)站点进行了1-4年的调查。这些场所的大气在气候上和污染水平方面都有特点,因此可以根据ISO标准表示其腐蚀性。锌腐蚀产物层(ZCPLs)的形态和化学表征使用扫描电子显微镜,能量色散光谱(SEM-EDS),X射线衍射(XRD),傅里叶变换红外光谱(FTIR)和可溶性盐评估进行技术。所得结果表明,锌的腐蚀速率是氯化物污染水平和润湿时间的函数。尽管还观察到了某些特殊类型的行为,但仍证明了Cl -和SO 2 的协同作用。

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  • 来源
    《British Corrosion Journal》 |2000年第4期|289-296|共8页
  • 作者单位

    LTR/INETI-Instituto Nacional de Engenharia e Tecnologia Industrial, Estrada do Pa?o do Lumiar 1649–038 Lisbon, Portugal;

    The Departamento de Ingenieria de Materiales Degradacion y Durabilidad, Centro de Investigaciones Metalurgicas, Av. Gregorio del Amo, Madrid, Spain;

    The Departamento de Investigaciones in Corrosion, CITEFA, Villa Martelli, Argentina;

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