T91钢在5.0% NaCl中性盐雾中的腐蚀行为
Corrosion Behavior of T91 Steel in Neutral Salt Spray with 5.0% NaCl Solution
摘 要
通过腐蚀质量损失分析，宏、微观腐蚀形貌观察及腐蚀产物分析等方法研究了T91钢在5.0%（质量分数）NaCl中性盐雾中的腐蚀行为。结果表明：在盐雾腐蚀过程的前75 h，T91钢的腐蚀速率较低，表面腐蚀产物生长缓慢，75 h后T91钢的腐蚀速率急剧增大，表面腐蚀产物快速增多增厚；T91钢表面的腐蚀产物主要为Fe和Cr的氧化物；T91钢表面首先产生局部腐蚀，进而发展成腐蚀斑，最后腐蚀斑底部产生新的局部腐蚀。
中性盐雾试验
局部腐蚀
T91 steel
neutral salt spray test
localized corrosion
Abstract
The corrosion behavior of T91 steel in neutral salt spray with 5% (mass) NaCl solution was studied by mass loss analysis, macro and micro morphology observation and corrosion product analysis. The results show that in the first 75 h of salt spray corrosion, the corrosion rate of T91 steel was low, and the surface corrosion products grew slowly; after 75 h, the corrosion rate of T91 steel sharply increased, and the surface corrosion products rapidly increased in quantity and thickness. The corrosion products on the T91 steel surface were mainly composed of oxides of Fe and Cr. The T91 steel surface first generated localized corrosion, and then the localized corrosion developed into corrosion pits. Finally, new localized corrosion occurred at the bottom of the corrosion pits.
中图分类号 TG172.4 DOI 10.11973/fsyfh-201806004
所属栏目 试验研究
基金项目 国家自然科学基金项目（51601164）；中国博士后科学基金（2017M622594）
收稿日期 2017/1/20
修改稿日期
网络出版日期
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联系人作者吴堂清(tqwu@xtu.edu.cn)
引用该论文: FENG Chao,PENG Bicao,XIE Yi,WANG Jun,LI Minghuan,LIU Yongxiong,WU Tangqing,YIN Fucheng. Corrosion Behavior of T91 Steel in Neutral Salt Spray with 5.0% NaCl Solution[J]. Corrosion & Protection, 2018, 39(6): 431
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参考文献
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【2】REN X,SRIDHARAN K,ALLEN T R. Corrosion of ferritic-martensitic steel HT9 in supercritical water[J]. Journal of Nuclear Materials,2006,358(2/3):227-234.
【3】CHEN Y,SRIDHARAN K,ALLEN T. Corrosion behavior of ferritic-martensitic steel T91 in supercritical water[J]. Corrosion Science,2006,48(9):2843-2854.
【4】KOFSTAD P. High temperature corrosion[M]. London:Elsevier Applied Science Publishers Ltd.,1988.
【5】张都清,徐敬军,赵国群,等. 9Cr-1Mo钢在含水蒸汽气氛中的氧化行为[J]. 材料研究学报,2008,22(6):599-605.
【6】高文华,沈朝,张乐福. T91钢在超临界水环境中的腐蚀性能[J]. 腐蚀与防护,2016,37(6):444-502.
【7】张清廉,王起江,刘彩玲. 抛光态T91无缝管腐蚀原因分析[J]. 宝钢技术,2014(4):61-65.
【8】余菲,袁曹龙,蒋娅,等. pH值、离子浓度、温度对T23与T92电化学腐蚀行为的影响[J]. 全面腐蚀控制,2010,24(4):6-10.
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