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低碳钢在模拟酸雨大气条件下的锈蚀演化
  • 期刊名称：腐蚀科学与防护技术，2008，20(6)
  • 时间：0
  • 分类：TG172.31[金属学及工艺—金属表面处理;金属学及工艺—金属学]
  • 作者机构：[1]东北大学,材料冶金学院,沈阳110004, [2]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
  • 相关基金：基金项目：国家重大基础研究发展规划（973）--高钢铁质量和使用寿命的冶金学基础研究”（2004CB619101）和国家自然科学基金重大项目（50499336）资助
  • 相关项目：自然环境腐蚀相关的若干基础性问题的研究
关键词： 低碳钢, 锈蚀演化, 模拟酸雨大气, 锈层结构, mild steel , rusting evolvement , simulated acid rain atmosphere , microstructure
中文摘要：

利用干湿循环加速腐蚀实验和电化学极化曲线法研究了低碳钢在模拟工业酸雨大气条件下的锈蚀演化过程，结果表明：实验初期锈蚀速度随于湿循环次数的增加而增大，随后转为随干湿循环次数的增加而降低；带锈低碳钢的干湿循环下的腐蚀产物促进阴极过程抑制阳极过程；在干湿循环加速腐蚀进程中低碳钢表面铁锈的化学组成、结构变化表现为在锈蚀初期α—FeOOH含量较低，锈层疏松，锈蚀速度随干湿循环次数增加呈上升趋势；后期随α—FeOOH含量的增加和锈层变得更加致密，腐蚀速度转变为随干湿循环次数增加而下降．

英文摘要：

Corrosion rate of mild steel under wet/dry alternate conditions with 0. 052mass% NaHSO3 （ pH 4） solution was measured. It increased with increasing wet/dry alternate cycles in the initial stage while decreased in the later stage. The change of corrosion rates of mild steel is related to the evolution of the rust in composition and mierostrncture,which is caused by the occurrence of α-FeOOH and Fe304 in the rust layer. Polarization curves of the rusted mild steel in the solution of 0. 052mass% NaHSO3 （ pH 4） showed that the corrosion products formed in the initial stage could accelerate the cathodic process while suppressed the anodic process. A flow chart was proposed to describe the atmospheric corrosion behavior of mild steel.

同期刊论文项目
自然环境腐蚀相关的若干基础性问题的研究
期刊论文 118 会议论文 40
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