镁合金磷化工艺研究
Liaoning Chemical Industry(2017)
Abstract
以提高AZ91D镁合金耐蚀性为主要目的,采用化学磷化在其表面制备了锌系磷化膜.通过盐雾试验、电化学阻抗(EIS)以及Tafel曲线等方法研究了磷化膜的外观形貌与耐蚀性.结果表明,在磷化时间15 min,温度60℃,酸比6~8区间范围内磷化膜盐雾试验5.5 h不生锈腐蚀.调节磷化液酸比范围有效的改善了磷化膜的膜层质量,间接提高了镁合金的耐蚀性,延长使用寿命.
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