The study investigates the practical application of cyclic wet/dry corrosion tests in simulated industrial atmospheres to assess the impact of chromium (Cr) on the protective properties of vanadium micro‐alloyed weathering steels. Two types of steels were examined: a V‐N steel and a V‐N‐Cr micro‐alloyed weathering steel. These steels were subjected to corrosion tests with 0.01 mol/L NaHSO3 at a pH range of 4.4–4.8 for varying durations. The findings indicate that the inclusion of Cr in the composition of vanadium micro‐alloyed weathering steel enhances corrosion resistance and leads to the accumulation of Cr in the inner rust layer. Furthermore, the distribution of corrosion‐resistant elements (Cr, Ni, Cu, P, and Mo) in V‐N and V‐N‐Cr steels is analyzed. The rust layer was observed to exhibit stratification in the corrosive environment, with the outer layers being dense and uniform, while the inner layers were porous and exhibited poor adhesion to the matrix. The study also delves into the anticorrosion mechanism of vanadium weathering steel using techniques such as X‐ray diffractometer, electron probe microanalysis, and potential‐phase diagram.

中文翻译：

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Cr对低碳钒微合金耐候钢在模拟工业气氛中腐蚀行为的影响

该研究调查了模拟工业气氛中循环湿/干腐蚀试验的实际应用，以评估铬 (Cr) 对钒微合金耐候钢防护性能的影响。研究了两种类型的钢：V-N 钢和 V-N-Cr 微合金耐候钢。这些钢用0.01 mol/L NaHSO进行腐蚀试验3pH 值范围为 4.4–4.8，持续时间不同。研究结果表明，钒微合金化耐候钢成分中的Cr含量增强了耐腐蚀性能，并导致Cr在内锈层中积累。此外，还分析了 V-N 和 V-N-Cr 钢中耐腐蚀元素（Cr、Ni、Cu、P 和 Mo）的分布。腐蚀环境下锈层呈现分层现象，外层致密、均匀，内层多孔，与基体附着力差。该研究还利用X射线衍射仪、电子探针微分析和电位相图等技术深入研究了钒耐候钢的防腐机理。