植酸
镨
电化学
腐蚀
镁
复合数
铬酸盐转化膜
涂层
材料科学
吸附
化学
氧化物
转化膜
化学工程
无机化学
冶金
复合材料
物理化学
有机化学
电极
工程类
生物化学
作者
Zhongli Zou,Kun Liu,Yang Li
标识
DOI:10.1080/15421406.2022.2158278
摘要
AZ31B has the advantages of high specific strength, low melting point and good toughness, but one of the significant disadvantages is poor corrosion resistance. This topic designed and prepared a corrosion-resistant composite coating of organic polymer phytic acid and rare earth praseodymium salt based on this characteristic. The test results show that the corrosion resistance of the PA/Pr composite coating is more potent than that of a single phytic acid conversion coating, and the surface of the composite layer is clustered particles with good compactness. The conversion coating mainly consists of praseodymium hydroxide, oxide and some phytate compounds. In addition, density functional theory (DFT) was used to analyze the inhibition mechanism of phytic acid; Molecular dynamics (MD) was used to evaluate the adsorption characteristics of phytic acid on metal substrates and rare earth metal oxides.
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