Development of Artificial Rainfall Equipment for Studying the Effect of Rain on the Corrosion Behaviors

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  • To Dara
    National Institute for Material Science Graduate School of Engineering, Yokohama National University
  • Shinohara Tadashi
    National Institute for Material Science
  • Umezawa Osamu
    Graduate School of Engineering, Yokohama National University

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Abstract

<p>Atmospheric corrosion is an electrochemical process which can only proceed in the presence of an electrolyte film. Rain is one of the main factors in initiating the time of wetness and transporting the chemical substance from the atmosphere to metal surface that guide to accelerate the corrosion attack. In this case study, an artificial rainfall equipment was developed with the aim of defining the behaviors of atmospheric corrosion which is affected by rain and chemical species. The Atmospheric Corrosion Monitoring （ACM） sensor which consists of a Fe-Ag couple was used to measure the corrosivity of the rainfall solution by finding the relation between the Corrosion Rate （CR） and the sensor output. The controllable precipitation rate and its distribution facilitate in investigating the effect of rainfall on the corrosion behaviors. The relation between the sensors output and CR enable to predict the corrosivity of the atmosphere. Thus, the developed artificial rainfall equipment is an essential and reliable tool for studying the corrosion behaviors under the effect of rain.</p>

Journal

  • Zairyo-to-Kankyo

    Zairyo-to-Kankyo 66 (2), 58-61, 2017

    Japan Society of Corrosion Engineering

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