东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (10): 1416-1419.DOI: -

• 材料与冶金 • 上一篇    下一篇

氧化铁皮对低碳钢大气腐蚀行为的影响

何永全1，孙彬2，刘振宇1，李俊1,3   

  1. (1.东北大学轧制技术及连轧自动化国家重点实验室，辽宁沈阳110819；2.沈阳大学 机械工程学院，辽宁沈阳110044；3.宝山钢铁股份有限公司研究院，上海201900)
  • 收稿日期:2013-03-23 修回日期:2013-03-23 出版日期:2013-10-15 发布日期:2013-05-24
  • 通讯作者: 何永全
  • 作者简介:何永全(1985-)，男，河南洛阳人，东北大学博士研究生；刘振宇(1967-)，男，内蒙古赤峰人，东北大学教授，博士生导师；李俊(1965-)，男，江西赣州人，宝山钢铁股份有限公司教授级高级工程师，东北大学博士生导师.
  • 基金资助:
    “十二五”国家科技支撑计划项目(2011BAE13B04).

Effects of Oxide Scale on Industrial Atmosphere Corrosion of Low Carbon Steels

HE Yongquan1， SUN Bin2， LIU Zhenyu1， LI Jun1,3   

  1. 1. State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China; 2. School of Mechanical Engineering， Shenyang University， Shenyang 110044， China; 3. Research Institute， Baoshan Iron & Steel Co.， Ltd.， Shanghai 201900， China.
  • Received:2013-03-23 Revised:2013-03-23 Online:2013-10-15 Published:2013-05-24
  • Contact: HE Yongquan
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摘要： 利用干湿交替腐蚀试验模拟工业大气环境，研究了层状结构氧化铁皮对热轧低碳钢工业大气腐蚀行为的影响.采用SEM和电化学手段对比分析带氧化铁皮和不带氧化铁皮试样的腐蚀增重行为、锈层结构和电化学行为.结果表明，带氧化铁皮试样的腐蚀速度远低于无氧化铁皮覆盖的基体钢，带氧化铁皮试样的自腐蚀电位低于基体钢，单一物相层状结构的氧化铁皮具有很好的耐腐蚀性，能够有效保护基体钢板；氧化铁皮的完整性是保护带钢基体不被腐蚀的前提，如果氧化层被破坏，在破损位置处，氧化铁皮与钢基体接触发生电偶腐蚀，加速腐蚀反应的进行.

关键词: 氧化铁皮, 低碳钢, 工业大气腐蚀, 干湿交替腐蚀试验, 局部腐蚀

Abstract: Effects of the layerstructure oxide scale on the industrial atmosphere corrosion of hotrolled low carbon steels were investigated by wet/dry cyclic corrosion test. The corrosion weight gain， corrosion product structure and electrochemistry behavior of the specimens with the oxide scales were analyzed compared with that of the specimens without the oxide scales through scanning electron microscopy (SEM) and electrochemistry methods. It was found that the corrosion rate of the samples with oxide scale was lower than that of the naked steel. Polarization curves indicated that the samples covered with oxide scale had a lower corrosion potential than that of the naked steel. Single phase layered structure oxide scales had a good corrosion resistance that kept the substrate steel from corrosion. The integrity of oxide scale was the crucial prerequisite that the oxide scale protect the substrate steel. If the oxide scale was broken， galvanic corrosion will happen between the iron oxide and the substrate steel at the location of defects.

Key words: oxide scale, low carbon steel, industrial atmosphere corrosion, wet/dry cyclic corrosion test, local corrosion

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