Effect of small amounts of alloyed tin on the electrochemical behaviour of aluminium in sodium chloride solution

Electrochemical behavior of active surface layers in AA8xxx aluminum alloys

“…This shift is most likely related to the removal of the Mg‐ and Sn‐rich oxide film on the surfaces. Indeed, Mg tends to shift the corrosion potential of Al in the negative direction, while Sn promotes the anodic activation of aluminium . The passive behavior observed for the bulk of both alloys could be related to the formation of a fresh and more protective oxide film after sputtering the oxide layer enriched of Mg, Sn, and possibly Pb, in line with the GDOES profile presented in Figure A.…”

“…In particular, the corrosion behavior of rolled aluminum products might be affected by deformed grain‐refined surface layers formed during thermomechanical processing of the alloys or by the segregation of alloying elements or trace elements including lead, tin, indium, and gallium . The role of Sn and Pb was investigated in several publications considering both commercial 8xxx alloys and binary‐model alloys . Work on binary model alloys evidenced that even small amounts of trace elements like Sn and Pb could lead to a marked anodic activation due to segregation at the metal surface .…”

“…25,26 The role of Sn and Pb was investigated in several publications considering both commercial 8xxx alloys and binary-model alloys. [25][26][27][28] Work on binary model alloys evidenced that even small amounts of trace elements like Sn and Pb could lead to a marked anodic activation due to segregation at the metal surface. [27][28][29][30] The effect of Sn on the electrochemical behavior of Al was deeply investigated in the past evidencing its activation effect in model-binary and ternary alloys.…”

“…[25][26][27][28] Work on binary model alloys evidenced that even small amounts of trace elements like Sn and Pb could lead to a marked anodic activation due to segregation at the metal surface. [27][28][29][30] The effect of Sn on the electrochemical behavior of Al was deeply investigated in the past evidencing its activation effect in model-binary and ternary alloys. [31][32][33][34][35][36][37] Moreover, galvanic coupling with Sn might contribute to anodic activation of Al.…”

Investigation of corrosion behavior of 3003 aluminum alloy in flue gas condensate

“…The movement of the anions in the oxide layer is expected to result from the interaction between their sizes and charges, the structure of the oxide around them, and the generated Al 3+ cations . Besides, when aluminum alloys are immersed in solutions containing chloride ions, pitting corrosion occurs . The corrosion behaviors of aluminum depend on the electrolyte composition, potential, and temperature .…”