Effectiveness of Corrosion Inhibitors in Retarding the Rate of Propagation of Localized Corrosion

Investigating pitting in X65 carbon steel using potentiostatic polarisation

“…Zhuo and Turnbull [12] evolved a two compartment cell arrangement to study stress corrosion cracking in prepitted Ni-Cr-Mo-V steel. Turnbull et al [7,13] later utilised a similar method to evaluate inhibitors in their ability to retard localised corrosion. The design entailed separating the anode and cathode compartment but electrically coupled with a zero resistance ammeter (ZRA).…”

Electrochemistry and XPS study of an imidazoline as corrosion inhibitor of mild steel in an acidic environment

“…Oleic imidazoline (OI) base inhibitors are well known to have a high activity in acidic medium and therefore are used in oil field to minimize carbon dioxide-induced corrosion [13][14][15]. Similarly, these molecules have been tested against hydrogen sulfide corrosion of carbon steel with success [16,17].…”

Development of an automated underwater abrasion rig to determine galvanic effects during the growth and localised breakdown of surface films in CO2-containing solutions

“…One particular method which has proved popular for evaluating localised corrosion/ pit propagation in CO2 environments is the so called 'artificial pit' or 'pencil pit' technique [ 1,22,23] The system consists of a large car bon steel cathode and a small diameter (1 to mm) anodic 'pit' sample of the same material which is positioned ideally in the centre or in close pr oximity to the large sample (to minimise ohmic resistance in the aqueous phase) and isolated in the solution using resin or Polyether ether ketone (PEEK). The anode and cathode are galvanically connected externally from the cell using a potentiostat and monitored using a zero-resistance ammeter (ZRA).…”

“…Examples of the application or variations on this galvanic coupling technique include work by Marsh et al [22] and Turnbull of al. [23] to evaluate localised corrosion propagation in CO2 environments in the pr esence of inhibitors, Amri et al [6,7] to investigate pit gr owth in car bon steel in the pr esence of acetic acid, and by both Han et al [1] and Fer nandez-Domene et al [21] to evaluate the pr opensity for localised corrosion/ pits to propagate in environments where the formation and disruption of protective FeCO3 films are possible.…”