强酸溶液对铸造铝合金腐蚀行为的影响
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摘要
铝合金是一种应用广泛的金属材料。然而在大气污染日益严重的情况下,铝合金受到的腐蚀加重。本研究采用失重法对A356.2铝合金材料在盐酸、硫酸及硝酸中腐蚀行为进行研究,结果表明:铝合金样品对盐酸腐蚀最为敏感,对不同浓度的硝酸和硫酸却存在着钝化点,且腐蚀速率随周期增长而提高。
Aluminum alloys are widely used in the field of metal material. The corrosion of aluminum alloy was increased due to the serious atmospheric pollution. A wrought aluminum alloy was corrosion under the condition of hydrochloric acid, sulfuric acid and nitric acid. The corrosion test by weight loss corrosion measurement. The results show that aluminum alloy under the condition of hydrochloric acid has the fastest corrosion rate. And the corrosion rate grow along with the cycle time when under the condition of sulfuric acid and nitric acid, but there is a passivation points with different concentration of nitric acid and sulfuric acid.
Aluminum alloys are widely used in the field of metal material. The corrosion of aluminum alloy was increased due to the serious atmospheric pollution. A wrought aluminum alloy was corrosion under the condition of hydrochloric acid, sulfuric acid and nitric acid. The corrosion test by weight loss corrosion measurement. The results show that aluminum alloy under the condition of hydrochloric acid has the fastest corrosion rate. And the corrosion rate grow along with the cycle time when under the condition of sulfuric acid and nitric acid, but there is a passivation points with different concentration of nitric acid and sulfuric acid.
引文
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[2]万晔.金属的大气腐蚀及其实验方法[M].化学工业出版社,2013,12.
[3]周和荣,李晓刚,董超芳.铝合金及其氧化膜大气腐蚀行为与机理研究进展[J].装备环境工程,2006,3(1):1-9.
[4]J E Hatch.Aluminum:properties and physical metallurgy[M].Ohio:American Society for Metals,1984,279.
[5]Graedel T E.Corrosion Mechanisms for Aluminum Exposed to the Atmosphere[J].Journal of the Electrochemical Society,1989,136(4):C204-C212.
[6]马腾,王振尧,韩薇.铝和铝合金的大气腐蚀[J].腐蚀科学与防护技,2004,16(3):155-161.
[7]Sinyavskii V S,Ulanova V V,Kalinin V D.On the mechanism of intergranular corrosion of aluminum alloys[J].Protection of metals,2004,40(5):481-490.
[8]Wang Q,Zhao Y,Yan K,et al.Corrosion behavior of spray formed 7055aluminum alloy joint welded by underwater friction stir welding[J].Materials&Design,2015,68:97-103.
[9]刘国元.晶间腐蚀评价标准ASTM G67国内试验条件适应性研究[J].热加工工艺,2014,43(12):90-91.
[10]李久青,屠益东,肖珩,等.船用铝镁合金剥落腐蚀机理的研究[J].材料保护,1994,27(4):1-4.
[11]李芳芳.高强铝合金剥落腐蚀的研究综述[J].湖南冶金职业技术学院学报,2009,9(2):9-12.