Potentiodynamic studies on anodic dissolution and passivation of tin, indium and tin–indium alloys in some fruit acids solutions

作者: Abdel-Rahman El-Sayed , Hossnia S. Mohran , Hany M. Abd El-Lateef

DOI: 10.1016/J.CORSCI.2009.06.050

关键词: PassivationScanning electron microscopeIndiumCorrosionDissolutionCitric acidInorganic chemistryElectrodeTinMaterials science

摘要: Abstract The anodic dissolution and passivation of tin, indium tin–indium alloys were studied in 0.5 M solutions both malic citric acids, using potentiodynamic technique characterized by X-ray diffraction (XRD) scanning electron microscopy (SEM). E / I curves showed that the behavior all investigated electrodes exhibits active/passive transition. active region tin involves two peaks (I II) prior to passive while one peak acid. These correspond formation InOOH In(OH) 3 /In 2 O system, respectively, but observed acid is InOOH. for ( , II III ) (I) shoulders (II). This shoulder predominates with increasing temperature due little In its at higher temperatures. disappearance this IV V high percent may be large amounts oxides on surface.

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