Effect of nonmetallic inclusions on localized corrosion of spring steel

• 作者: Wei-ning Shi Shu-feng Yang Jing-she Li
• 来源期刊: 矿物冶金与材料学报
• 年，卷（期）: 2021,（3）
• 页码范围: 390-397
• 页数: 8页
• 语种: 英文

摘要

Certain inclusions in high-strength 60Si2Mn-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 3wt％ FeCl3 solution for different times. The results show that severe corrosion occurred in areas of clustered CaS inclusions. Sulfide inclu-sions containing Ca and Mg induced the strongest localized corrosion susceptibility. For the case of (Ca,Mn,Mg)S inclusions, the ability to in-duce localized corrosion susceptibility is ranked as follows: MgS > CaS > MnS. Moreover, CaS, (Ca,Mn)S, and (Ca,Mn,Mg)S inclusions were mainly responsible for inducing environmental embrittlement.