ABSTRACT We have studied here the wet/dry cyclic corrosion behaviour of V-N-0.8Cr weathering steel and compared with a reference steel (Q345B) in 0.01 mol/L NaHSO3 simulated industrial atmosphere. The study indicated that the coherent protective oxide layer formed in the surface of V-N-0.8Cr microalloyed weathering steel, contained corrosion resistant alloying elements (Cr, Ni, Cu, P, Mo). The addition of Cr significantly inhibited the corrosion of weathering steel. The corrosion rate of V-N-0.8Cr and Q345B steel after 360 h corrosion were 1.60 g/(h·cm2) and 2.42 g/(h·cm2) respectively. The major corrosion products in both the steels mainly constituted of α-FeOOH and γ- FeOOH and Fe3O4. The stratification of the corrosion layer evolved into a dual-layer structure, where the outer layer was dense and the inner layer was a loose and porous structure in V-N-0.8Cr weathering steel. This is different from previous studies. Cr tends to be concentrated in the inner corrosion layer.

中文翻译：

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VN-8Cr耐候钢在模拟工业气氛中的电化学行为

摘要 我们在此研究了 VN-0.8Cr 耐候钢的湿/干循环腐蚀行为，并与参考钢 (Q345B) 在 0.01 mol/L NaHSO3 模拟工业气氛中进行了比较。研究表明，VN-0.8Cr微合金耐候钢表面形成的连贯保护氧化层含有耐腐蚀合金元素（Cr、Ni、Cu、P、Mo）。Cr的加入显着抑制了耐候钢的腐蚀。VN-0.8Cr和Q345B钢腐蚀360 h后的腐蚀速率分别为1.60 g/(h·cm2)和2.42 g/(h·cm2)。两种钢中的主要腐蚀产物主要由α-FeO​​OH和γ-FeOOH和Fe3O4组成。腐蚀层的分层演变为双层结构，VN-0.8Cr耐候钢外层致密，内层为疏松多孔结构。这与以往的研究不同。Cr倾向于集中在腐蚀层内。