Corrosion Assessment of Regenerative Preheaters in Oil-Fired Power Plants

Uruchurtu, J.; Malo, J. M.; García, Eduardo; Cano, U.; Mariaca, L.; Martínez, Alberto

doi:10.5006/1.3292080

Cited by 6 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8 presents the potential and current noise time series and noise resistance at 60 o C, under dynamic conditions. The noise time series present high amplitude low frequency with superimposed low amplitude high frequency oscillations, associated to generalized corrosion under diffusion control [13]. The noise resistance oscillated between 500 Kohms-cm 2 and 3 Mohms-cm 2 .…”

Section: Impedancementioning

confidence: 98%

On-line Corrosion Monitoring of 70 Cu 30 Ni Alloy in a LiBr Solution under Absorption Heat Pump Flow Conditions

Urzúa¹,

Siqueiros²,

Morales³

et al. 2009

Port. Electrochim. Acta

View full text Add to dashboard Cite

Electrochemical techniques for on-line monitoring were used to study 70Cu-30Ni alloy corrosion in lithium bromide solution under flow operating conditions in an absorption heat pump. The cause of metallic corrosion on the studied alloy is the localized attack of the passive film surface by bromide ions at lower temperatures, and dissolution of the protective film at higher temperatures and flow conditions. Laboratory experiments were performed using the rotating disk electrode (RDE) under dynamic conditions and different temperatures, similar to the operating pump parameters. This was done to understand the corrosion behavior of the copper alloy prior to on-line monitoring assessment. A corrosion probe consisting in three identical copper alloy ring electrodes embedded in Teflon tube sections to isolate them, with the same diameter as the piping to prevent breaking down pipe flow continuity, was designed and installed. Results under various operating conditions were evaluated. Measurements obtained showed the dynamics of this industrial system and the benefits of real time monitoring in understanding corrosion behavior of 70Cu-30Ni alloy in lithium bromide solution used as working fluid and heat absorbent in heat pumps.

show abstract