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

作　　者：卢彩彬 李莎莎[1] 陶钧[1] 芦玉峰[1] 邓利蓉[1] Lu Caibin;Li Shasha;Tao Jun;Lu Yufeng;Deng Lirong(Northwest Institute of Nuclear Technology,Xi'an 710024,China)

机构地区：[1]西北核技术研究所,西安710024

出　　处：《涂层与防护》2024年第8期27-33,48,共8页Coating and Protection

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。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 

分 类 号：TQ630[化学工程—精细化工]