Abstract Hydrofluoric acid doped PANI (PANI-HF) particles were added to a magnesium (Mg)-rich primer (MRP) on AZ91D Mg alloy and the influence of the particles on the primer was investigated. The optimal PANI-HF particle content was 1 wt.%. These particles improved the electrical contact between Mg particles and the AZ91D substrate, thereby enhancing the cathodic protection. Subsequently, the products of Mg particles (MgO and MgF2) precipitated in the coating and improved the barrier effects. Moreover, PANI captured some chloride ions, thereby reducing degradation of the coating. Eventually, the protective film formed on the AZ91D substrate blocked the electrolyte permeation, retarding the corrosion of the substrate.

中文翻译：

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氢氟酸掺杂聚苯胺对AZ91D镁合金富mg环氧涂层保护性能的影响

摘要 在AZ91D镁合金的富镁（Mg）底漆（MRP）中加入氢氟酸掺杂PANI（PANI-HF）颗粒，研究了颗粒对底漆的影响。最佳 PANI-HF 颗粒含量为 1 wt.%。这些颗粒改善了镁颗粒和 AZ91D 基板之间的电接触，从而增强了阴极保护。随后，Mg 颗粒的产物（MgO 和 MgF2）在涂层中沉淀并提高了阻隔效果。此外，PANI 捕获了一些氯离子，从而减少了涂层的降解。最终，AZ91D 基板上形成的保护膜阻止了电解液的渗透，延缓了基板的腐蚀。