Yu Yang, Chen Junge, Mi Le, Feng Aihu, Yu Yun, Xiao Fei
Department of Materials Science, Fudan University, Shanghai, 200433, PR China.
Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, PR China.
Heliyon. 2024 Feb 4;10(3):e25587. doi: 10.1016/j.heliyon.2024.e25587. eCollection 2024 Feb 15.
In this study, a simple in-situ preparation method for coating on Mg-Zn alloy in a carbonic acid solution was investigated. The formation of a precursor carbonate layer on the alloy surface was observed. As the soaking time increased, the solution gradually turned alkaline, leading to the transformation of the precursor into a basic carbonate coating with a layered hydroxide structure. The corrosion potential () of the coated samples initially decreased and then increased with increasing the soaking time. After 2 h of soaking, the lowest corrosion potential observed was approximately -1.5105 V. At 12 h, the corrosion potential reached around -1.4645 V, which was comparable to that of the ZK61M magnesium alloy. After 48 h, the corrosion potential was measured to be approximately -1.3507 V.
在本研究中，对一种在碳酸溶液中对镁锌合金进行涂层的简单原位制备方法进行了研究。观察到合金表面形成了前驱体碳酸盐层。随着浸泡时间的增加，溶液逐渐变为碱性，导致前驱体转变为具有层状氢氧化物结构的碱式碳酸盐涂层。涂层样品的腐蚀电位（）最初随着浸泡时间的增加而降低，然后升高。浸泡2小时后，观察到的最低腐蚀电位约为-1.5105 V。在12小时时，腐蚀电位达到约-1.4645 V，与ZK61M镁合金相当。48小时后，测量的腐蚀电位约为-1.3507 V。
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