Abstract The intergranular corrosion behavior of the low-chromium ferritic stainless steel without Cr-carbide precipitation was investigated by the methods of qualitative and quantitative corrosion testing and microstructural analysis. The intergranular corrosion susceptibility of the aged stainless steels can be attributed to the Cr-depleted zone formation induced by Cr-C co-segregation to grain boundaries before Cr-carbide nucleation. The change of intergranular corrosion morphology after aging at 450 °C from discontinuous (aged for 2 h) to semi-continuous (aged for 20 h) and to continuous (aged for 200 h) is discussed in detail.

中文翻译：

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时效后无碳化铬析出的低铬铁素体不锈钢晶间腐蚀行为

摘要 采用定性和定量腐蚀试验和显微组织分析方法研究了无碳化铬析出的低铬铁素体不锈钢的晶间腐蚀行为。时效不锈钢的晶间腐蚀敏感性可归因于在 Cr-碳化物成核之前由 Cr-C 共偏析到晶界引起的 Cr 贫化区的形成。详细讨论了 450°C 时效后晶间腐蚀形态从不连续（时效 2 h）到半连续（时效 20 h）和连续（时效 200 h）的变化。