23Co14Ni12Cr3Mo超高强钢在模拟海水环境中的腐蚀行为

采用模拟海水干湿交替气氛的周期浸润腐蚀、模拟海水大气环境的中性盐雾腐蚀及模拟海水全浸区的全浸腐蚀三种加速腐蚀实验方法以及电化学阻抗谱技术进行了23Co14Ni12Cr3Mo超高强钢在海水模拟环境下的腐蚀行为。采用扫描电镜和X射线衍射方法对腐蚀形貌及腐蚀产物组分进行分析研究。结果表明：在模拟环境加速腐蚀实验中,23Co14Ni12Cr3Mo超高强钢腐蚀产物可分为外层锈层γ-FeOOH和内层锈层α-FeOOH,通过模拟三种海水环境的腐蚀速率得出干湿交替环境中的耐腐蚀性最差,腐蚀均是从点蚀开始,慢慢扩大,由局部腐蚀逐渐发展成均匀腐蚀。...

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Bibliographic Details
Published in材料工程 no. 1; pp. 42 - 50
Main Author 于美 董宇 王瑞阳 祁晋豫 刘建华 李松梅
Format Journal Article
LanguageChinese
Published 北京航空航天大学材料科学与工程学院,北京,100191%中国人民解放军驻沈阳飞机工业(集团)有限公司军事代表室,沈阳,110034 2012
Subjects
交流阻抗谱
加速腐蚀实验
模拟海水环境
超高强钢
模拟海水环境
加速腐蚀实验
交流阻抗谱
超高强钢
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ISSN1001-4381
1001-4381
DOI10.3969/j.issn.1001-4381.2012.01.010

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Summary:采用模拟海水干湿交替气氛的周期浸润腐蚀、模拟海水大气环境的中性盐雾腐蚀及模拟海水全浸区的全浸腐蚀三种加速腐蚀实验方法以及电化学阻抗谱技术进行了23Co14Ni12Cr3Mo超高强钢在海水模拟环境下的腐蚀行为。采用扫描电镜和X射线衍射方法对腐蚀形貌及腐蚀产物组分进行分析研究。结果表明：在模拟环境加速腐蚀实验中,23Co14Ni12Cr3Mo超高强钢腐蚀产物可分为外层锈层γ-FeOOH和内层锈层α-FeOOH,通过模拟三种海水环境的腐蚀速率得出干湿交替环境中的耐腐蚀性最差,腐蚀均是从点蚀开始,慢慢扩大,由局部腐蚀逐渐发展成均匀腐蚀。
Bibliography:ultra-high strength steel; simulated seawater environment; accelerated corrosion method; electrochemical impedance spectroscopy
YU Mei,DONG Yu,WANG Rui-yang,QI Jin-yu,LIU Jian-hua,LI Song-mei（1 School of Materials Science and Engineering,Beihang University,Beijing 100191,China;2 PLA Military Representative Office in Shenyang Aircraft Industries（Group）Co.,Ltd.,Shenyang 110034,China）
11-1800/TB
The corrosion behavior of ultra-high strength steel 23Co14Ni12Cr3Mo was investigated by three accelerated corrosion methods,alternating immersion corrosion,neutral salt spray and full immersion tests,and electrochemical impedance spectroscopy in simulated seawater environment.The morphology of corrosion products was observed by SEM and the composition was analyzed by X-ray diffraction.The results show that the corrosion product layer is composed of outer rust layer γ-FeOOH and inner rust layer α-FeOOH.The corrosion process begins with pit corrosion,then the corrosion area expands and the uniform corrosion forms with the cor
ISSN:1001-4381
1001-4381
DOI:10.3969/j.issn.1001-4381.2012.01.010