| Influence of acid deposition on atmospheric corrosion of zinc |
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| 作者姓名： | Zheng Yiping Wang Zhenyao Zhang Fengqiu |
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| 作者单位： | Zheng Yiping，Wang Zhenyao and Zhang FengqiuInstitute of Corrosion and Protection of Metals，Academia Sinica，Shenyang 110015，China |
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| 摘 要： | Site exposure tests both open and sheltered have been carried out in acid deposition area in Southwest China. Results from six sites show that acid deposition exerts a great influence on atmospheric corrosion of Zn, and it is more serious in wet condition. Basically, Zn corrosion is directly proportional to time of exposure. While SO2 is the main pollutant of the atmosphere environment, Zn corrosion has a linear relationship to SO2 depositing rate and a hyperbolic to rain pH value.Observations by SEM, EDAX and X-ray diffraction show that under sheltered exposure condition, the corrosion products of Zn in heavy acid deposition area principally are sulphates.Based on the corrosion rates measured, the working life of galvanized steel can be predicated.
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| 关 键 词： | acid deposition atmospheric corrosion zinc. |
| 收稿时间： | 1989/5/30 0:00:00 |
Influence of acid deposition on atmospheric corrosion of zinc |
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| Zheng Yiping,Wang Zhenyao,Zhang Fengqiu.Influence of acid deposition on atmospheric corrosion of zinc[J].Journal of Environmental Sciences,1991,3(2):53-60. |
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| Authors: | Zheng Yiping Wang Zhenyao and Zhang FengqiuInstitute of Corrosion and Protection of Metals Academia Sinica Shenyang China |
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| Institution: | Zheng Yiping,Wang Zhenyao and Zhang FengqiuInstitute of Corrosion and Protection of Metals,Academia Sinica,Shenyang 110015,China |
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| Abstract: | Site exposure tests both open and sheltered have been carried out in acid deposition area in Southwest China. Results from six sites show that acid deposition exerts a great influence on atmospheric corrosion of Zn, and it is more serious in wet condition. Basically, Zn corrosion is directly proportional to time of exposure. While SO2 is the main pollutant of the atmosphere environment, Zn corrosion has a linear relationship to SO2 depositing rate and a hyperbolic to rain pH value.Observations by SEM, EDAX and X-ray diffraction show that under sheltered exposure condition, the corrosion products of Zn in heavy acid deposition area principally are sulphates.Based on the corrosion rates measured, the working life of galvanized steel can be predicated. |
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| Keywords: | acid deposition atmospheric corrosion zinc |
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