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铝在含SO_2湿润/干燥环境中的腐蚀规律
Corrosion of aluminum in wet/dry environment containing SO_2
查看参考文献11篇
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文摘
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利用气体腐蚀试验箱、红外光谱和扫描电镜研究了铝在含SO_2的湿润气氛-不含SO_2的干燥气氛循环的加速试验条件下的腐蚀规律。并进行了未加SO_2而其它试验条件相同的对比试验。试验共分别进行5个周期 (120h)。随着时间延长，SO_2的腐蚀性作用明显加强，铝的腐蚀表现出正指数变化规律，即铝的腐蚀速率随时间延长不断增加。结果还显示出铝在含SO_2的潮湿环境中很难形成保护性好的A1_2O_3膜，铝在此试验环境中的腐蚀产物为A1_2(SO_4)_3·18H_2O。在未加S0_2的对比试验环境中铝的腐蚀轻微，5个周期累计质量增加仅为 0．043g／m~2，腐蚀质量损失明显小于加S0_2时的腐蚀质量损失；试样表面仍很光亮。 |
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其他语种文摘
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The corrosion of aluminum in wet/dry enviroment containing SO_2 was studied by using IR and SEM. The compared test without SO_2 was also carried out. The test went on for 5 cycles (120 h). The corrosive effect of SO_2 became strong during the test. The corrosion of aluminum followed a function of positive exponent. It shows that the corrosion rate of aluminum increases with time. The results also indicate that, a protect film of A1_2O_3 can not form on aluminum in wet environment containing SO_2. The main corrosion product in the test environment is A1_2(SO_4)_3·18H_2O. The aluminum was corroded lightly in the compared test environment, and the mass increase was only 0. 043 g/m~2. The corrosion mass loss was smaller obviously than that in accelerate corrosive environment containing SO_2. The surface of specimens was still shiny compared with that with SO_2. |
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来源
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中国有色金属学报
,2003,13(3):631-634 【核心库】
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关键词
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铝
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大气腐蚀
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SO_2
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地址
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中国科学院金属研究所, 金属腐蚀与防护国家重点实验室, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1004-0609 |
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学科
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冶金工业 |
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基金
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国家973计划
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文献收藏号
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CSCD:1306663
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