Review of micro-scale and atomic-scale corrosion mechanisms of second phases in aluminum alloys
Yuanyuan Ji, Yunze Xu, Binbin Zhang, Yashar Behnamian, Da‐Hai Xia, Wenbin Hu
Abstract
Localized corrosion of aluminum (Al) alloys, such as pitting corrosion, intergranular corrosion, and stress corrosion cracking is closely related to the micro-galvanic corrosion between the second phase and the Al matrix. Using high-resolution transmission electron microscopy and first principles calculations, the factors that affect corrosion mechanisms of the second phase in Al alloys at micro-scale and atomic-scale were examined, including the composition and structure of second phase, pH of the environment, stress and adsorption behavior of adsorbates (such as Cl−, H2O, OH− and O2−).
Topics & Concepts
Intergranular corrosionMaterials scienceCorrosionStress corrosion crackingMetallurgyAluminiumAtomic unitsGalvanic cellPitting corrosionPhase (matter)Galvanic corrosionTransmission electron microscopyNanotechnologyChemistryOrganic chemistryQuantum mechanicsPhysicsCorrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsAluminum Alloy Microstructure Properties