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以宝钢SS400热轧钢为原料,控制加热温度,在钢表面制备氧化皮。采用SEM分析了氧化皮表面、截面形貌;X射线衍射仪分析氧化皮的相组成;进行室内干湿周期浸润腐蚀试验,对氧化皮试样在NaHSO3(0.01 mol/L)溶液中进行了耐蚀性测试。结果表明,分别在600、700、800℃氧化180 min的过程基本遵循抛物线规律。经过600℃加热保温30 min,所形成的氧化皮厚度小于10μm,700℃时厚度为15μm左右,800℃达到50μm。600、700、800℃制备的氧化皮均含Fe3O4、Fe2O3相和Fe颗粒。同时,800℃制备的氧化皮中保留有少量FeO相。不同温度所制备氧化皮试样耐蚀性能依次为700、600、800℃。
Baosteel SS400 hot-rolled steel as raw material, control the heating temperature, the surface of the steel prepared oxide scale. The surface and sectional morphology of the oxide scale were analyzed by SEM. The phase composition of the oxide scale was analyzed by X-ray diffractometer. The wet and dry cycle immersion corrosion test was carried out. The oxidation resistance of the oxide scale sample in NaHSO3 (0.01 mol / L) Erosion test. The results show that the process of oxidation at 600, 700 and 800 ℃ for 180 min basically follows the parabolic law. After 600 ℃ heat-holding for 30 min, the thickness of the formed scale is less than 10μm, the thickness is about 15μm at 700 ℃, and 50μm at 800 ℃. The scale prepared at 600, 700 and 800 ℃ contains Fe3O4, Fe2O3 and Fe particles. At the same time, a small amount of FeO phase remained in the scale prepared at 800 ℃. The corrosion resistance of oxide scale specimens prepared at different temperatures was 700, 600, 800 ℃.