目的 研究Al2O3纳米粒子环氧复合涂层对钢筋的防护性能.方法 制备Al2O3纳米粒子,将其添加至环氧涂料中,并涂覆在工业钢筋表面成膜.通过XRD和SEM对Al2O3进行表征;利用电化学噪声、交流阻抗谱分析技术,对复合涂层在3.5％(质量分数)NaCl介质中对工业钢筋的防护性能进行测试分析.结果 制备的氧化铝纳米粒子的粒径平均为75 nm.通过对电化学噪声测试的有效数据进行时域和频域分析,通过交流阻抗谱分析及数据拟合,认为Al2 O3纳米粒子添加量为0.1％(以占环氧树脂质量的百分比计)时,涂层对钢筋的防护性能最好.结论 向环氧涂层中添加适量的Al2 O3纳米粒子,可以明显提升其对钢筋的防护性能.
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