Effect of nonmetallic inclusions on localized corrosion of spring steel
来源期刊：International Journal of Minerals Metallurgy and Materials2021年第3期
论文作者：Wei-ning Shi Shu-feng Yang Jing-she Li
摘 要：Certain inclusions in high-strength 60 Si2Mn–Cr spring steel result in poor resistance to localized corrosion. In this work, to study the effect of inclusions on the localized corrosion behavior of spring steel, accelerated corrosion tests were performed by immersing spring steel in 3 wt% FeCl3 solution for different times. The results show that severe corrosion occurred in areas of clustered Ca S inclusions. Sulfide inclusions containing Ca and Mg induced the strongest localized corrosion susceptibility. For the case of（Ca,Mn,Mg）S inclusions, the ability to induce localized corrosion susceptibility is ranked as follows: Mg S > Ca S > Mn S. Moreover, Ca S,（Ca,Mn）S, and（Ca,Mn,Mg）S inclusions were mainly responsible for inducing environmental embrittlement.
Wei-ning Shi，Shu-feng Yang，Jing-she Li
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing
摘 要：Certain inclusions in high-strength 60 Si2Mn–Cr spring steel result in poor resistance to localized corrosion. In this work, to study the effect of inclusions on the localized corrosion behavior of spring steel, accelerated corrosion tests were performed by immersing spring steel in 3 wt% FeCl3 solution for different times. The results show that severe corrosion occurred in areas of clustered Ca S inclusions. Sulfide inclusions containing Ca and Mg induced the strongest localized corrosion susceptibility. For the case of（Ca,Mn,Mg）S inclusions, the ability to induce localized corrosion susceptibility is ranked as follows: Mg S > Ca S > Mn S. Moreover, Ca S,（Ca,Mn）S, and（Ca,Mn,Mg）S inclusions were mainly responsible for inducing environmental embrittlement.
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