Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (06): 659-663.doi: 10.3866/PKU.WHXB20040622

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Atmospheric Corrosion of A3 Steel Deposited with Different Salts

Wan Ye;Yan Chuan-Wei;Cao Chu-Nan   

  1. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
  • Received:2003-12-02 Revised:2004-03-03 Published:2004-06-15
  • Contact: Wan Ye

Abstract: The atmospheric corrosion of A3 steel with Na2SO4、(NH4)2SO4、NH4Cl and NaCl deposited on it has been investigated at 298 K with relative humidity of (85±5)%. The results show: that A3 steel deposited by the salts corroded more and more seriously as the corrosion time went on and metal loss obeys the equation of Δm/A =K•tb. FTIR, SEM and XRD were utilized to study the development and characterization of corrosion products, and the results indicate that A3 steel with the salts deposited corroded much faster than the blank samples, and the corrosion of A3 steel initialed along the deposition area of the salts.

Key words: Steel A3, Salt, Deposition, Atmospheric corrosion