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Book Chapter10.1520/stp10882s

Time of Wetness (TOW) and Surface Temperature Characteristics of Corroded Metals in Humid Tropical Climate

L. Véleva,MA Alpuche-Aviles-2002-01-01
10

TL;DRAbstract

In the description of an environment and explanation of corrosion phenomena the most important data are represented by the combination of relative humidity (RH) and temperature (T), often described as temperature-humidity complex (T-RH). It is well known that in open air the metallic corrosion correlates with the time during which a thin film of electrolyte covers the metal surface (i.e., TOW), which determines the duration of the electrochemical corrosion process. According to ISO 9223 TOW can be calculated from the T-RH complex or measured with appropriated sensors. The metal surface real temperature, which effect is not included in ISO 9223:92, can provide very important information about the kinetics of the corrosion process. During five years, metal samples (low carbon steel, copper and zinc) were exposed to tropical humid climate of the Peninsula of Yucatan, Mexico, in two typical environments, marine-coastal (MC) and rural-urban (RU). The registered metal temperature (Tm) and TO

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In the description of an environment and explanation of corrosion phenomena the most important data are represented by the combination of relative humidity (RH) and temperature (T), often described as temperature-humidity complex (T-RH). It is well known that in open air the metallic corrosion correlates with the time during which a thin film of electrolyte covers the metal surface (i.e., TOW), which determines the duration of the electrochemical corrosion process. According to ISO 9223 TOW can be calculated from the T-RH complex or measured with appropriated sensors. The metal surface real temperature, which effect is not included in ISO 9223:92, can provide very important information about the kinetics of the corrosion process. During five years, metal samples (low carbon steel, copper and zinc) were exposed to tropical humid climate of the Peninsula of Yucatan, Mexico, in two typical environments, marine-coastal (MC) and rural-urban (RU). The registered metal temperature (Tm) and TO

Keywords

Environmental scienceTropical climateHumid subtropical climateClimatologyAtmospheric sciencesGeologyGeography

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