模拟水溶液中低合金钢缝隙腐蚀敏感性研究
Study on Crack Corrosion Sensitivity of Low Alloy Steel in Simulated Aqueous Solution
卢彩彬 1李莎莎 1陶钧 1芦玉峰 1邓利蓉1
作者信息
摘要
针对钢结构表面及其支撑结构在某环境水溶液中的腐蚀情况,开展了低合金钢在模拟水溶液的缝隙腐蚀实验、浸泡实验及电化学实验等研究,分析了低合金钢无缝试样与缝隙试样在模拟水溶液中的腐蚀形貌、腐蚀产物成分、电化学参数等.研究结果表明,低合金钢在模拟水溶液中的腐蚀以电化学反应为主,锈层腐蚀初期产物为Fe(OH)3、FeOOH类产物,中后期产物为铁的无定型氧化物Fe3O4,且缝隙试样腐蚀弱于无缝试样,缝隙内腐蚀远远弱于缝隙外腐蚀.因此,低合金钢在模拟水溶液中对缝隙腐蚀不敏感.
Abstract
In view of the corrosion of steel strusture surface and its supporting strusture in an ambient water solution,the crack corrosion experiment,soaking experiment and electrochemical experiment of low alloy steel have been studied in the simulated aqueous solution.The corrosion morphology,corrosion product composition and electrochemical parameters of low alloy steel seamlss sample and crack sample in simulated aqueous solution have been analyzed.The results show that the corrosion of low alloy steel is mainly electrochemical reaction in the simulated aqueous solution.The initial corrosion products of rust layer are Fe(OH)3 and FeOOH products while the corrosion products in middle and later period are Fe3O4.The corrosion of crack sample is weaker than that of seamless sample,and the corrosion in the crack is much weaker than the corrosion outside the crack.Therefore,low alloy steel is not sensitive to crack corrosion in the simulated aqueous solution.
关键词
水溶液/低合金钢/缝隙腐蚀Key words
aqueous solution/low alloy steel/crack corrosion引用本文复制引用
出版年
2024
NETL
NSTL
万方数据