Atmospheric and Marine Corrosion of PEO and Composite Coatings Obtained on Al-Cu-Mg Aluminum Alloy

Materials

IvanM. Medvedev¹  SergeyL. Sinebryukhov²  DmitriyV. Mashtalyar²  NikolajV. Izotov²  IgorE. Vyaliy²  KonstantineV. Nadaraia²  VladimirS. Egorkin²  SergeyV. Gnedenkov²  AndreyS. Gnedenkov² 

[1] All-Russian Scientific-Research Institute of Aviation Materials, 105005 Moscow, Russia;Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia;

关键词: plasma electrolytic oxidation;    Al alloy;    atmospheric corrosion;    marine corrosion;   

DOI  :  10.3390/ma13122739

来源: DOAJ

【 摘 要 】

Wrought Al-Cu-Mg aluminum alloy (D16) was treated by bipolar plasma electrolytic oxidation to create a base plasma electrolytic oxidation (PEO)-coating with corrosion protection and mechanical properties superior to bare alloy’s natural oxide layer. Additional protection was provided by the application of polymer, thus creating a composite coating. Electrochemical and scratch tests, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction studies were performed. Degradation of coatings in the marine atmosphere and seawater was evaluated. The composite polymer-containing coating provided better corrosion protection of aluminum alloy compared to the PEO-coating, although seawater affected both. During the atmospheric exposure, the PEO-coating provided reasonably good protection, and the composite coating showed excellent performance.

【 授权许可】

Unknown