Corrosion Behaviors of Aluminum Alloys in Simulated SO2 Pollute Atmosphere

ZHOU He-rong;LI Xiao-gang;DONG Chao-fang;XIAO Kui

Journal of Aeronautical Materials ›› 2008, Vol. 28 ›› Issue (2) : 39-45.

PDF(2044 KB)
PDF(2044 KB)
Journal of Aeronautical Materials ›› 2008, Vol. 28 ›› Issue (2) : 39-45.

Corrosion Behaviors of Aluminum Alloys in Simulated SO2 Pollute Atmosphere

Author information +
History +

Abstract

The corrosion behaviors of aluminum alloys 1060,2A12 and 7A04 in two different experimental conditions were investigated by scanning electron microscope(SEM),energy dispersive X-ray detection(EDX),Fourier transform infrared(FTIR),X-ray diffraction(XRD) and mass gain method in simulated 50ppm SO2 pollute atmosphere.The mechanical capability of experimental materials under different corrosion time was tested.The results show that the corrosion product increases with testing hours prolonging,mass gain of corrosion product adding and according with exponential attenuation rule as Δm/A=B+Dexp(-t/k),strength and elongation percentage declining.Surface observation showed that corrosion product was agglomerate and accidented,extending forth.The corrosion product of aluminum alloys in simulated 50ppm SO2 atmosphere was little and composed of alumina and aluminum sulfate.But the corrosion product of aluminum alloys on the surface of 70μg·cm-2 sodium chloride was more in simulated 50ppm SO2 atmosphere,mass gain of corrosion product adding more,strength and elongation percentage declining more greatly,corrosion product made up of alumina,aluminum sulfate hydrate and aluminum chloride.

Key words

aluminum alloys / SO2 pollute / mass gain method / atmospheric corrosio

Cite this article

Download Citations
ZHOU He-rong, LI Xiao-gang, DONG Chao-fang, XIAO Kui. Corrosion Behaviors of Aluminum Alloys in Simulated SO2 Pollute Atmosphere[J]. Journal of Aeronautical Materials, 2008, 28(2): 39-45

References

NEUFELD A K,COLE I S,BOND A M,et al.The initial mechanism of corrosion of zinc by sodium chloride particle deposition[J].Corrosion Science,2002,44:555-572.
SVENSSON J E,JOHANSSON L G.A laboratory study of the initial stages of the atmospheric corrosion of zinc in the presence of NaCl,influence of SO2 and NO2[J].Corrosion Science,1993,34(5):721-740.
QU Q,YAN C W,WAN Y,et al.Effects of NaCl and SO2 on the initial atmospheric corrosion of zinc[J].Corrosion,2002,44:2789-2903.
BENGTSSON B D,LINDSTROM R.The influence of CO2 on the NaCl-induced atmospheric corrosion of aluminum[J].J of the Electrochemical Society,2001,148(4):B127-B132.
屈庆,严川伟,张蕾,等.NaCl和SO2在A3钢初期大气腐蚀中的协同效应[J].金属学报,2002,38(10):1062-1066.
林翠,李晓刚.NaCl沉积和SO2污染对镁合金初期大气腐蚀行为的影响[J].北京科技大学学报,2004,16(5):524-528.
ANDREATTA F,LOHRENGEL M M,TERRYN H,et al.Electrochemical characterisation of aluminum AA7075-T6 and solution heat treated AA7075 using a micro-capillary cell[J].Electrochimica Acta 48 (2003):3239-3247.
GRAEDEL T E.Corrosion mechanisms for aluminum exposed to the heat atmosphere[J].J of the Electrochemical Society,1989,136(4):204c-212c.
NEUFELD A K,COLE I S.Using fourier transforming infrared analysis to detect corrosion products on the surface of metals exposed to atmospheric conditions[J].Corrosion,1997,53(10):788-799.
ELOLA A S,OTERO T P,PORRO A E.Evolution of the pitting of aluminum exposed to the atmosphere[J].Corrosion,1992,48(10):854-863.
BUCHHEIT R G,MARTINEZ M A,MONTES L P.Evidence for Cu ion formation by dissolution and dealloying the Al2CuMg intermetallic compound in rotating ring-dish collection experiments[J].J of the Electrochemical Society,2000,147:119-138
BUCHHEIT R G,GRANT R P,HLAVAA P F,et al.Local dissolution phenomena associated with S phase (Al2CuMg) particles in aluminum alloy 2024-T3[J].J of the Electrochemical Society,1997,144(8):2621-2628.
PDF(2044 KB)

11

Accesses

0

Citation

Detail

Sections
Recommended

/