Abstract The corrosion of AZ91D magnesium alloy has received extensive attention due to the continuous expansion of its application field in recent years. However, the corrosion of AZ91D magnesium alloy in distilled water is relatively few. In this paper, the corrosion behavior of AZ91D magnesium alloy was studied in distilled water by electrochemical tests in combination with weight loss and surface analysis methods. The results indicated that the corrosion rate of AZ91D magnesium alloy increased with the increase of temperature and immersion time. The increase of the corrosion rate of AZ91D magnesium alloy with the increase of immersion time might be attributed to the damage of the structure of corrosion product film by hydrogen evolution, significantly accelerating the anodic process of AZ91D magnesium alloy. It was interesting that, in distilled water, the EIS of AZ91D magnesium alloy excluded an inductive arc in the low frequency region, which indicated that there was no the adsorption and desorption of aggressive ions or the damage and repair of film. The corrosion product film of AZ91D magnesium alloy in distilled water was composed of a compact inner corrosion product film and a loose outer corrosion product film.

中文翻译：

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AZ91D镁合金在蒸馏水中的腐蚀行为

摘要 近年来，AZ91D镁合金的应用领域不断扩大，其腐蚀问题受到广泛关注。但AZ91D镁合金在蒸馏水中的腐蚀相对较少。本文采用电化学测试结合失重和表面分析方法研究了AZ91D镁合金在蒸馏水中的腐蚀行为。结果表明，AZ91D镁合金的腐蚀速率随着温度和浸泡时间的增加而增加。AZ91D镁合金的腐蚀速率随着浸泡时间的增加而增加，可能是由于析氢对腐蚀产物膜结构的破坏，显着加速了AZ91D镁合金的阳极过程。有趣的是，在蒸馏水中，AZ91D镁合金的EIS排除了低频区的感应电弧，表明没有侵蚀性离子的吸附和解吸或膜的损坏和修复。AZ91D镁合金在蒸馏水中的腐蚀产物膜由致密的内腐蚀产物膜和疏松的外腐蚀产物膜组成。