R. E. Hummel, R. J. Smith and E. D. Verink Jr, “The Passivation of Nickel in Aqueous Solutions I—The Identification of Insoluble Corrosion Products on Nickel Electrodes Using Optical and ESCA Techniques,” Corrosion Science, Vol. 27, No. 8, 1987, pp. 803-813. doi:10.1016/0010-938X(87)90038-2

has been cited by the following article:

• TITLE: Inhibition Mechanism of Pitting Corrosion of Nickel in Aqueous Medium by Some Macrocyclic Compounds

  AUTHORS: Fatma Mohamed Mahgoub, Ahmed Mohamed Hefnawy

  KEYWORDS: Organic Inhibitors; Polarization; Pitting

  JOURNAL NAME: Open Journal of Physical Chemistry, Vol.2 No.4, November 27, 2012

  ABSTRACT: Anodic polarization of nickel was studied by potentiostatic technique in neutral media in presence of two macrocyclic ligands. Pit initiation was detected by measuring pitting potential, Ep and the charge transfer, Q during the anodic polarization. Initiation of pitting and Q were found to be dependent on the structure and concentrations of inhibitors. Under steady state conditions, the inhibition efficiency was in the order 1, 4, 8, 11 tetraazacyclotetradecane (cyclam) > N, N’-bis (2-aminoethyl) 1, 3-propandiamine (2,3,2-tet) due to macrocyclic effect. These findings were confirmed by fitting the data to different adsorption isotherms. Adsorption on nickel surface was obeyed kinetic-thermodynamic model for the two inhibitors. Influence of [Cl–] on corrosion behavior of nickel in sulphate solution containing inhibitors was investigated. A mechanism involving three competitive equilibria of dissolution of nickel in presence and absence of the inhibitors was proposed. Empirical and theoretical kinetic equations were compared and discussed. There is a good agreement between the calculated and observed rate constants.