Influence of Bacillus safensis and Bacillus pumilus on the electrochemical behavior of 2024-T3 aluminum alloy

Sensitive and selective detection of heavy metal ions and organic pollutants with graphene-integrated sensing platforms

“…The sensing mechanism of graphene-based sensors primarily relies on the interaction between the functionalized graphene surface and the target analytes. 43 When an analyte interacts with a graphene surface, it causes changes in the electrical properties 44 (such as resistance, capacitance, or current) or optical properties 45 (such as fluorescence or absorption) of graphene. These interactions can lead to electron transfer, charge redistribution, or changes in the graphene's work function, which can be detected and measured.…”

Focusing on the relationship between the precipitated phases and the pitting corrosion of ZL101A aluminum alloy

“…The passive film of Al formed in a neutral environment contains Al(OH) 3 , which can be free from the corrosion of H + and OH − and maintain high stability for matrix [1,3,7,10,14]. Thus, it can be inferred that both the corrosion products and the passive film can protect the ZL101A from corrosion.…”

“…Generally, the precipitation of intermetallic compounds on aluminum alloy, including Al-Si-Mg intermetallic particles, Mg 2 Si phase, Al-Cu-Mg phase and Al-Cu-Fe-Mn phase, should be the main reason for increased corrosion sensitivity [6][7][8][9][10][11][12]. It has been found that the pitting corrosion may occur on aluminum alloy due to the existence of the precipitated phases, besides the destruction from the corrosive ions like Cl − and SO 4 2− on the passive film (Al 2 O 3 ) [1,10,11,[13][14][15]. Meanwhile, the micro galvanic couple on aluminum alloy was directly related to the potential difference between precipitated phases and matrix, which was attributed to the uneven distributions of microstructure and composition caused by the precipitated phases [2,5,8,10,[14][15][16].…”

“…It has been found that the pitting corrosion may occur on aluminum alloy due to the existence of the precipitated phases, besides the destruction from the corrosive ions like Cl − and SO 4 2− on the passive film (Al 2 O 3 ) [1,10,11,[13][14][15]. Meanwhile, the micro galvanic couple on aluminum alloy was directly related to the potential difference between precipitated phases and matrix, which was attributed to the uneven distributions of microstructure and composition caused by the precipitated phases [2,5,8,10,[14][15][16]. Grilli et al believed that the initial corrosion positions correlated with the Al-Cu-Fe-Mn second phases on the 2219 aluminum alloy, and the phases were considered as cathodes during the corrosion process.…”