【摘要】 采用单辊急冷法制取非晶态Fe₇5Cr₅P₁3C₇合金薄带。对试样进行了成分、结构、力学性能分析。并通过全漫法、动电位极化曲线和恒电位电流密度-时间曲线的测量,研究Fe₇5Cr₅P₁3C₇合金在IN H₂SO₄、IN H₂SO₄+0.5N NaCl、IN HCI、10％FeCl₃·6H₂O溶液中的耐蚀性能。结果表明,单棍急冷法制取Fe₇5Cr₅P₁3C₇合金工艺简单,这种材料性能稳定,其在酸性介质中具有优异的耐蚀性,当介质中含有C1^-时,对耐蚀性没有影响,不产生孔蚀。优异的耐蚀性可归因于合金本身无晶界、位错、偏析等缺陷及具有极高的活性,能迅速形成钝化膜。它是高梯度磁分离装置的一种性能优良的聚磁材料。更多还原

【Abstract】 Thin ribbons of amorphous Fe₇₅Cr₅P₁₃C₇ alloy were prepared by single-roll rapid-quenching method. The composition, structure and mechanical property of the samples were analysed. Corrosion behaviour of the alloy in 1N H₂SO₄, 1N H₂SO₄+0.5N NaCl, 1N HCl and 10% FeCl₃·6H₂O solutions was investigated by means of the method of complete immersion and the curves experimentally determined of potentiodynamic polarization and of potentiostatic current density vs. time. The results indicate that the property of the amorphous alloy prepared by the simple method mentioned is stable. It is exceedingly corrosion-resistant in acid mediums. Its corrosion behaviour was not significantly affected and it did not suffer pitting when the medium contained Cl^- ions, The high resistance to corrosion of the amorphous alloy might be the result of that there are no crystalline defects such as grain boundaries, dislocation faults, segregation etc, in it, and that it has extremely high reactiyity with rapid formation of passive film.更多还原