| Corrosion of carbon steel, zinc and copper by air pollution in Chongqing |
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| 作者姓名： | YE Di ZHAO Da-wei CHEN Gang-cai ZHANG Dong-bao |
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| 作者单位： | Chongqing Institute |
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| 基金项目： | Regional Air Pollution in Developing Countries under the contract No. JT73065. |
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| 摘 要： | This paper presents the research on the atmospheric corrosion rates of carbon steel, zinc and copper in Chongqing, which was a corrosion subprogram of an international project, Regional Air Pollution in Developing Countries. We performed field exposure tests of carbon steel, zinc and copper at an urban site Guanyinqiao and a rural site Tieshanping inChongqing, then used grey relational analysis, based on the database of the whole corrosion project, to determine the order of the effect of environmental factors on corrosion rates of tested metals, and established dose-response functions for these three metals. The results showed that the two crucial agents of acidic environment, SO2 and H , were common factors that contributed most to the corrosion of the tested metals. The established dose-response functions for outdoor carbon steel and zinc are proved applicable to use in Chongqing, but the function for copper needs further modifying. We employed these dose- response functions and general environmental data to elaborate the maps of corrosion rate respectively of carbon steel and zinc by geological information system (GIS) technique which help to identify areas of high corrosion damage risk. An acceptable annual average SO2 level of 21 μg/m3 for carbon steel and that of 61 μg/m3 for zinc are also put forward to control the air pollution impact on atmospheric corrosion in Chongqing urban areas.
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| 关 键 词： | 重庆市 空气污染 碳素钢 铜 锌 大气腐蚀 |
| 文章编号： | 1671-8224（2007）01-0014-08 |
| 收稿时间： | 2006-05-30 |
| 修稿时间： | 2006-09-20 |
Corrosion of carbon steel, zinc and copper by air pollution in Chongqing |
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| YE Di,ZHAO Da-wei,CHEN Gang-cai,ZHANG Dong-bao.Corrosion of carbon steel, zinc and copper by air pollution in Chongqing[J].Journal of Chongqing University,2007,6(1):14-21. |
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| Authors: | YE Di ZHAO Da-wei CHEN Gang-cai and ZHANG Dong-bao |
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| Institution: | Chongqing Institute of Environment Science and Monitoring, Chongqing 400020,P. R. China;;Chongqing Institute of Environment Science and Monitoring, Chongqing 400020,P. R. China;;Chongqing Institute of Environment Science and Monitoring, Chongqing 400020,P. R. China;;Chongqing Institute of Environment Science and Monitoring, Chongqing 400020,P. R. China; |
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| Abstract: | This paper presents the research on the atmospheric corrosion rates of carbon steel, zinc and copper in Chongqing, which was a corrosion subprogram of an international project, Regional Air Pollution in Developing Countries. We performed field exposure tests of carbon steel, zinc and copper at an urban site Guanyinqiao and a rural site Tieshanping inChongqing, then used grey relational analysis, based on the database of the whole corrosion project, to determine the order of the effect of environmental factors on corrosion rates of tested metals, and established dose-response functions for these three metals. The results showed that the two crucial agents of acidic environment, SO2 and H , were common factors that contributed most to the corrosion of the tested metals. The established dose-response functions for outdoor carbon steel and zinc are proved applicable to use in Chongqing, but the function for copper needs further modifying. We employed these dose-response functions and general environmental data to elaborate the maps of corrosion rate respectively of carbon steel and zinc by geological information system (GIS) technique which help to identify areas of high corrosion damage risk. An acceptable annual average SO2 level of 21 μg/m3 for carbon steel and that of 61 μg/m3 for zinc are also put forward to control the air pollution impact on atmospheric corrosion in Chongqing urban areas. |
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| Keywords: | air pollution atmospheric corrosion dose-response functions acid deposition sulfur dioxide |
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