Corrosion Behaviors of Cadmium Plated Steel Used for Aircraft Caused by Runway De-icing Fluids
摘 要
采用全浸泡腐蚀试验方法和电化学测试研究了飞机常用镀镉钢在机场道面除冰液中的腐蚀行为。采用能谱和红外光谱分析了腐蚀产物的构成。结果表明:在机场道面除冰液中,随着温度的升高,镀镉钢试件的腐蚀速率逐渐增大,镀镉钢的腐蚀不是纯扩散控制的电化学反应,阳极的电化学反应与镀镉层的腐蚀溶解有关;经过铬酸盐钝化后的镀镉钢和镀镉钛钢在机场道面除冰液中的腐蚀可能存在多个氧化还原反应,铬酸盐钝化产物也参与了电化学反应,腐蚀反应比较复杂;腐蚀产物中含有碳酸盐和磷酸盐;镀镉钢表面上的碳酸盐可能来自机场道面除冰液有机盐的分解,磷酸盐可能来自机场道面除冰液中的缓蚀剂或pH缓冲剂。
Abstract
Total immersion corrosion test and electrochemical test were used to study the corrosion behavior of cadmium plated steel in runway de-icing fluids. EDX and FTIR were used to characterize the composition of corrosion products. Results showed that the corrosion rate increased with the increase of temperature, the cadmium plated steel corrosion in runway de-icing fluid was not pure diffusion-controlled electrochemical reactions and the electrochemical reactions of anode were related to the cadmium plating layer corrosion dissolution process. After chromate treatment of cadmium plated steel and cadmium titanium plated steel, their corrosion in runway de-icing fluid may include multiple REDOX reactions, the corrosion reaction was complex because chromate treatment products were also involved in the electrochemical reaction. The corrosion products consisted of carbonate and phosphate. The carbonate formation was related to decomposing of organic acid salts in runway de-icing chemicals and phosphate was related to pH buffer agent or corrosion inhibitor in runway de-icing chemicals.
中图分类号 TG174 DOI 10.11973/fsyfh-201611001
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(U1333103); 中国民航局安全能力建设资助项目(AADSA0023)
收稿日期 2015/7/8
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备注张亚博(1981-),工程师,硕士,主要从事航空材料、航空维护化学品的理化性能、飞机相容性测试、飞机涂料性能测试等相关工作,
引用该论文: ZHANG Ya-bo,PENG Hua-qiao,SU Zheng-liang,WANG Qiang,LIN Xiu-zhou,ZHANG Fan. Corrosion Behaviors of Cadmium Plated Steel Used for Aircraft Caused by Runway De-icing Fluids[J]. Corrosion & Protection, 2016, 37(11): 865
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【3】BAKER A,DUTTON S,KELLY D. Composite materials for aircraft structures[M]. 2nd ed. Boston:Reston American Institute of Aeronautics and Astronautics,2004.
【4】KORPINIEMI H. The effect of runway de-icing chemicals on the corrosion of cadmium coatings[J]. Exogenous Demctology,2002,24(1):79-84.
【5】SAI X. Impact of airport pavement deicing products on aircraft and airfield infrastructure[J]. Phs One,2008,9(3):923-930.
【6】HU Y H. Advances in CO2 conversion and utilization[M]. Washington:American Chemical Society,2010.
【7】WALRE R R. Principles and prevention of corrosion[J]. Materials & Design,1993(3):207.
【8】Gigest A R. Alternative aircraft and pavement deicers and anti-icing formulations with improved environmental characteristics[J]. Acrp Research Results Digest,2010(9):209-219.
【9】HUTTUNEN-SAARIVIRTA E,KORPINIEMI H,KUOKKALA V T. Paajanen corrosion of cadmium plating by runway de-icing chemicals:study of surface phenomena and comparison of corrosion tests[J]. Surface & Coatings Technology,2013(232):101-115.
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