... kinetics within the passive system, as well as the resulting mechanisms affecting electrode processes. Design/methodology/approach The study combines potentiostatic and potentiodynamic polarization tests with intermittent sliding experiments under controlled load and frequency. Current transient...

... shows the adsorption of Cl⁻ is dependent on the amount of Cr present. Cr oxides of the passive films on Fe50Cr and Fe75Cr alloys inhibited the adsorption of Cl⁻. Originality/value Investigation of the relationship between the Cr content and the role of Cl⁻ adsorption...

... by arc melting, and the cold-rolled and annealed alloys were prepared by processing the as-cast alloy. Findings The experimental results showed that a protective passivation film was formed on the surfaces of these CoCrNi MEA, and the stability and compactness of alloys increased in the sequence...

...Xiaochen Hu; Pei Zhang; Yong Zhou; Fuan Yan Purpose The purpose of this paper is to reveal the mechanism of nitrite (NO_2⁻) for the surface passivation of carbon steels in acidic environments through investigating the influences of 0.01 mol/L NaNO₂ addition...

..., electrochemical impedance measurements, scanning electron microscopy, Fourier transform infrared and energy dispersive X-ray analysis. Findings The presence of the cephalosporin compound in the corrosive medium shifted the corrosion potential of SS to much positive side, which enhances self-passivation of SS...

... Densification Corrosion resistance Electrolyte Interface Passivation Magnesium and its alloys have increased application in aspects of aerospace, electronics and automobile transportation and so on, due to outstanding properties such as lightness, good heat emission, high specific mechanical...

... environment‐friendly insulating coating on electrical steel was developed. The coating system of silane coupling agent and rare earth salt were used first in this coating to replace the chromate containing coating. In this study, it provided a successful combination of coating and passivation. Findings...

...Vahid Afshari; Changiz Dehghanian Purpose The purpose of this paper is to demonstrate the effect of grain‐size reduction on the stability of passive films formed on pure iron. Possible mechanisms capable of their improvement are discussed. Design/methodology/approach Nanocrystalline iron...

...Da‐jing Fang; Xu‐hui Mao; Ye‐ming Zhang; Zhi‐liang Chen; Min Liu; Fu‐xing Gan Purpose The purpose of this paper is to study the compound effect between silane and cerium salts in the passivation process of chemical conversion treatment of zinc. Design/methodology/approach Chemical conversion...

..., anodic switching potential and other devised potential/time perturbation regimes were evaluated in order to obtain an understanding of the reactions involved during the passivation process. The oxidation‐reduction peaks were analysed using a thermodynamic approach. It was possible to reveal the most...

... to offer optimal inhibition efficiency. Long‐term open circuit potential measurements indicated that effective passivation occurred within 3 days of immersion. The passive layer thus formed on the metal surface retained its protective capability for several weeks, even after test coupons were transferred...

... corresponding to Zn(OH)₂ or ZnO. This is followed by a passive region up to a certain potential; the passive current suddenly rises steeply without any sign of oxygen evolution. This denotes the breakdown of the passive film and initiation of pitting corrosion. It was found that the breakdown...

...M. Vishnudevan; G. Venkatachari; S. Muralidharan; N.S. Rengaswamy The corrosion behaviour of Inconel 600 and 601 alloys has been evaluated by DC polarisation method in orthophosphoric acid solution of concentrations 0.5N to 15N. The passivation range from + 200mV to + 800mV has been observed...

... for Fiat; safety parts for Mercedes gear boxes; and hoses for Opel. Lanthane 300 is a two-stage dip process, with a water rinse in between, followed by drying. Total immersion time is 60-90 seconds at a temperature of 60-65°C. Now available in the UK is a new water-based passivating system for zinc...