物理化学学报 >> 2004, Vol. 20 >> Issue (06): 659-663.doi: 10.3866/PKU.WHXB20040622

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可溶盐沉积对碳钢大气腐蚀的影响

万晔;严川伟;曹楚南   

  1. 中国科学院金属研究所 金属腐蚀与防护国家重点实验室,沈阳　110016
  • 收稿日期:2003-12-02 修回日期:2004-03-03 发布日期:2004-06-15
  • 通讯作者: 万晔 E-mail:ywan@imr.ac.cn

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 E-mail:ywan@imr.ac.cn

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摘要： 采用实验室模拟方法,在温度298 K、相对湿度(85±5)％的条件下,对经Na2SO4、(NH4)2SO4、NH4Cl 和NaCl沉积后的A3钢在净化空气中的大气腐蚀行为进行了研究.腐蚀动力学曲线表明,尽管沉积了不同的可溶盐,但随暴露时间的增加,A3钢单位面积的腐蚀质量损失均服从Δm/A=K•tb公式. 不同盐对A3钢的腐蚀失重影响有所不同. 用FTIR、SEM以及XRD分析研究了不同盐沉积的试样腐蚀4周后的组成和形貌,发现腐蚀主要沿着沉积了可溶盐的区域进行,并随着腐蚀时间的延长,生成不同的腐蚀产物,这些腐蚀产物使A3钢最初的快速腐蚀现象有所减缓.

关键词: A3钢, 可溶盐, 沉积, 大气腐蚀

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