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首页> 外文期刊>Surface & Coatings Technology >Corrosion behaviors of low carbon steel, SUS310 and Fe-Mn-Al alloy with hot-dipped aluminum coatings in NaCl-induced hot corrosion
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Corrosion behaviors of low carbon steel, SUS310 and Fe-Mn-Al alloy with hot-dipped aluminum coatings in NaCl-induced hot corrosion

机译：低碳钢，SUS310和具有热浸镀铝涂层的Fe-Mn-Al合金在NaCl诱导的热腐蚀中的腐蚀行为

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摘要

The hot corrosion behaviors of hot dip aluminized low carbon steel, SUS310 and Fe-Mn-Al-Cr-Si-C alloy with 9 mg cm(-2) of NaCl deposition were studied at 900 degreesC for 1-144 h in dry air. A preoxidation of as-dipped specimens at 900 degreesC for 2 h was also conducted. The formation of an aluminized layer and self-healing potential are responsible for the better hot corrosion resistance of as-dipped low carbon steel and SUS310. Owing to the high solubility of aluminum in the Fe-Mn-Al-Cr-Si-C alloy, the coated aluminum diluted rapidly and complex phase transformations were induced by the interdiffusion of the aluminum and alloy matrix. A nitrogen-attacked zone in the aluminized layer was also observed. The corrosion resistance of hot-dip aluminum coated Fe-Mn-Al-Cr-Si-C alloy was thus degraded. Preoxidation treatment increased the thickness of the aluminized layer, yet reduced the corrosion resistance of three alloy systems due to the formation of microcracks during the cooling and the further heating to elevated temperature. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 16]
机译：研究了热浸镀铝低碳钢，SUS310和9 mg cm（-2）NaCl沉积的Fe-Mn-Al-Cr-Si-C合金在干燥空气中于900摄氏度下的热腐蚀行为1-144小时。还对浸渍后的样品在900摄氏度下进行了2h的预氧化。渗铝层的形成和自我修复的潜力使原浸低碳钢和SUS310具有更好的抗热腐蚀性能。由于铝在Fe-Mn-Al-Cr-Si-C合金中的高溶解度，涂层铝迅速稀释，并且由于铝和合金基体的相互扩散而诱发了复杂的相变。还观察到渗铝层中的氮攻击区。因此，热浸镀铝的Fe-Mn-Al-Cr-Si-C合金的耐蚀性下降。预氧化处理增加了渗铝层的厚度，但由于在冷却过程中形成微裂纹并进一步加热至高温而降低了三种合金体系的耐腐蚀性。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：16]

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