Q235钢在模拟海水全浸区腐蚀行为的研究  

Research on Corrosion Behavior of Q235 Steel in Simulated Seawater Immersion Zone

作　　者：赵丹[1] 李羚[1] 李子潇[1] 杨立根[1] 

机构地区：[1]河北联合大学河北省现代冶金技术重点实验室,河北唐山063009

出　　处：《热加工工艺》2015年第12期108-111,共4页Hot Working Technology

摘　　要：为了研究Q235钢在海水中的耐腐蚀性及腐蚀机理,采用静态浸泡试验方法,研究了Q235钢的腐蚀速率、局部腐蚀形貌、腐蚀断面形貌,并对腐蚀层成分进行分析。结果表明:Q235钢在模拟海水全浸区的腐蚀速率先降低,然后略有升高,再略微降低,最后趋于稳定,其抗腐蚀能力较好;腐蚀先出现点蚀,最后形成连续的腐蚀层;腐蚀层分为两层:内锈层是Fe3O4、α-FeOOH、γ-FeOOH、β-FeOOH的混合物,外锈层是γ-FeOOH。To study the corrosion resistance and corrosion mechanism of Q235 steel in the sea, the static immersion test method was adopted. The corrosion rate, local corrosion morphology and corrosion section morphology of Q235 steel in different soak period were studied, and the chemical composition of the corrosion layer was analyzed. The results show that, the corrosion rate of Q235 steel in simulated seawater immersion zone reduces slightly at first, then a little rise, and reduces again until arrives at a stable state. The corrosion resistance, obtained in the end, is better. The pitting corrosion comes first, and finally continuous corrosion layer forms in the surface. The corrosion layer is divided into two layers： the inner layer is a mixture of FesO4, α-FeOOH, γ-FeOOH and β-FeOOH and the outer layer is γ-FeOOH.

关 键 词：Q235钢 海水全浸区 腐蚀速率 腐蚀形貌 腐蚀机理 

分 类 号：TG172.5[金属学及工艺—金属表面处理]