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首页> 外文会议>International conference on multi-functional materials and structures >Corrosion Behavior of Al-Si-Cr-Cu Bearing Low Carbon Steel in A Cyclic Dry/Wet Laboratory Test
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Corrosion Behavior of Al-Si-Cr-Cu Bearing Low Carbon Steel in A Cyclic Dry/Wet Laboratory Test

机译：循环干/湿实验室测试中Al-Si-Cr-Cu轴承低碳钢的腐蚀行为

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摘要

The corrosion behaviors of Al-Si-Cr-Cu bearing low carbon steel and a reference steel Q235 were tested in a cyclic dry/wet environment containing 0.01mol/L NaHSO3 in laboratory. Rust layers were observed by optical microscope (OM), scanning electron microscopy (SEM) and XRD. The electrochemical behaviors of the steels were studied on the polarization curves and electrochemical impedance spectroscopy (EIS). The results indicate that after 120h corrosion test, the annual corrosion rates of the designed steels reduce 42 % than Q235 at least. The corrosion products are generally iron oxyhydroxides and oxides such as FeOOH, γ-FeOOH, α-FeOOH, γ-Fe2O3, Fe3O4. The α-FeOOH possesses good stabilization mainly exits and can improve the corrosion resistance. There are the enrichments of Cu, Cr, Si and Al in the rust layer close to the matrix, which make the rust layer be more compact and protected. The corrosion currents of the two designed steels are lower than that of Q235, the corrosion potentials are higher than that of Q235 after Tafel fitting. The rust layer impedances of the designed steels are higher than that of Q235.
机译：在实验室中，在含有0.01mol / L NaHSO3的循环干/湿环境中，测试了含Al-Si-Cr-Cu的低碳钢和参考钢Q235的腐蚀行为。通过光学显微镜（OM），扫描电子显微镜（SEM）和XRD观察锈层。通过极化曲线和电化学阻抗谱（EIS）研究了钢的电化学行为。结果表明，经过120h腐蚀试验，设计钢的年腐蚀率至少比Q235降低42％。腐蚀产物通常是羟基氧化铁和诸如FeOOH，γ-FeOOH，α-FeO​​OH，γ-Fe2O3，Fe3O4的氧化物。 α-FeO​​OH具有良好的稳定性，主要存在于此并且可以提高耐蚀性。在靠近基体的防锈层中富集了Cu，Cr，Si和Al，这使防锈层更加致密和受到保护。两种设计钢的腐蚀电流均低于Q235，Tafel拟合后的腐蚀电位高于Q235。设计钢的防锈层阻抗高于Q235。

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