Purpose

This paper aims to investigate the impact of anodizing time and heat treatment on morphology, phase and corrosion resistance of formed coating. To characterize the anodic oxide layer, X-ray diffraction (XRD) patterns and scanning electron microscopy (SEM) that was equipped with energy dispersive spectroscopy (EDS) was hired. The corrosion behavior of oxide-coated samples was estimated by electrochemical polarization test in simulated body fluid (SBF).

Design/methodology/approach

Anodic oxidation method is applied to reinforce the corrosion and biological properties of biomaterials in the biomedical industry. In this paper, the alkaline NaOH (1 M) electrolyte was used for AZ31 magnesium alloy anodizing accompanied by heat treatment in the air.

Findings

It can be concluded that the best corrosion resistance belongs to the 10 min anodic oxidized sample and among the heat-treated samples the 30 min anodized sample represented the lowest corrosion rate.

Originality/value

In this study, to the best of the authors’ knowledge for the first time, this paper describes the effect of anodizing process time on NaOH (1 M) electrolyte at 3 V on corrosion behavior of magnesium AZ31 alloy with an alternate method to change the phase composition of the formed oxide layer. The morphology and composition of the obtained anodic oxide layer were investigated under the results of SEM, EDS and XRD. The corrosion behavior of the oxide coatings layer fabricated on the magnesium-based substrate was studied by the potentiodynamic polarization test in the SBF solution.

中文翻译：

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通过调整阳极氧化时间，然后在模拟体液中进行热处理，增强 AZ31 镁合金的腐蚀行为

目的

本文旨在研究阳极氧化时间和热处理对形成的涂层的形貌、相和耐腐蚀性的影响。为了表征阳极氧化层，采用了配备能量色散光谱 (EDS) 的 X 射线衍射 (XRD) 图案和扫描电子显微镜 (SEM)。通过在模拟体液 (SBF) 中的电化学极化测试来评估氧化物涂层样品的腐蚀行为。

设计/方法/方法

阳极氧化法在生物医学工业中用于增强生物材料的腐蚀和生物性能。在本文中，碱性NaOH（1M）电解液用于AZ31镁合金阳极氧化，同时在空气中进行热处理。

发现

可以得出结论，最好的耐腐蚀性属于 10 分钟阳极氧化样品，在热处理样品中，30 分钟阳极氧化样品代表最低的腐蚀速率。

原创性/价值

在这项研究中，据作者所知，本文首次描述了阳极氧化处理时间对 3 V NaOH (1 M) 电解液对镁 AZ31 合金腐蚀行为的影响，并采用了一种替代方法来改变形成的氧化层的相组成。在SEM、EDS和XRD结果下研究所得阳极氧化层的形貌和成分。通过在SBF溶液中的动电位极化试验研究了镁基基体上制备的氧化物涂层的腐蚀行为。