摘要
为探究饱和NaCl溶液环境下铝合金材料的腐蚀行为,筛选适用于此恶劣环境的材料,基于废盐精制回溶设备的实际工况,选取了2024、3003、5052、6061和70755种常见型号的铝合金材料,在饱和NaCl溶液中,于70,80,90,100,110℃下分别进行短期和长期的腐蚀试验。通过X射线衍射(XRD)、扫描电子显微镜(SEM)、能谱(EDS)等手段分析了其腐蚀形貌以及腐蚀产物。结果表明:6061铝合金无论在短期还是长期腐蚀中都表现出了优异的耐腐蚀性能,铝合金材料的腐蚀产物以Al_(2)O_(3)及Al(OH)_(3)为主,腐蚀类型包括局部的点蚀和剥蚀。模拟预测发现,GM(1,1)模型可以很好地反映铝合金腐蚀过程的变化规律,并可以通过计算得到不同时间的腐蚀程度,达到风险预测的效果。
For investigating the corrosion behavior of aluminum alloy materials in saturated NaCl solution environment and selecting suitable materials for this harsh environment,based on the actual working conditions of industrial waste salt refining and recycling equipment,five com-mon types of aluminum alloy materials of 2024,3003,5052,6061 and 7075 were selected to carry out short-term and long-term corrosion ex-periments in saturated NaCl solution at 70℃,80℃,90℃,100℃and 110℃,respectively.The corrosion morphology and corrosion prod-ucts were analyzed by X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS)and other methods.Results indicated that 6061 possessed excellent corrosion resistance in both short-term and long-term corrosion,the corrosion prod-ucts of aluminum alloy materials were mainly Al_(2)O_(3) and Al(OH)_(3),and the corrosion types included local pitting and denudation.Moreover,the simulation predictions revealed that GM(1,1)model could reflect the change law of the aluminum alloy corrosion process well,and the cor-rosion degree at different times could be calculated to achieve the effect of risk prediction.
作者
殷至豪
孙哲诚
马正茁
梁川
李乾永
徐炎华
刘志英
YIN Zhihao;SUN Zhecheng;MA Zhengzhuo;LIANG Chuan;LI Qianyong;XU Yanhua;LIU Zhiying(School of Environmental Science and Engineering,Nanjing Tech University,Nanjing 210009,China)
出处
《材料保护》
CAS
CSCD
2024年第4期90-105,113,共17页
Materials Protection
关键词
盐水腐蚀
铝合金材料
腐蚀
温度
GM(1
1)模型
salt water corrosion
aluminum alloy material
corrosion
temperature
GM(1,1)model
