Electrochemical monitoring of high temperature corrosion processes

Farrell, D.M.; Cox, W. Miles; Stott, F.H.; Eden, D. A.; Dawson, J.L.; Wood, G. C.

doi:10.1080/02619180.1985.11753274

Cited by 25 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Medium amplitude and high frequency random oscillations were observed within a range of 20?54 to 20?57 mA cm 22 , localised events were not presented. 13 Also, it is seen that all current values are negative, showing the preferential dissolution of one of the working electrodes of the electrochemical cell. The corresponding potential time series at the same time than that presented for current kept apparently constant through the time, nevertheless, the magnitude of the transients were in the order of 0?15 mV, as it can be seen in the detail of the graph at the fifteenth day.…”

Section: Electrochemical Noise Techniquementioning

confidence: 97%

Corrosion study of SS-316L exposed to LiBr–H₂O solution applying electrochemical techniques and weight loss method

Cuevas-Arteaga¹,

Guzmán²

2009

Corrosion Engineering, Science and Technology

View full text Add to dashboard Cite

Corrosion evaluation of SS-316L exposed to LiBr-H 2 O solution of 50 wt-% was investigated applying the electrochemical noise technique (ENT), potentiodynamic polarisation curves, and the weight loss method (WLM) at 25, 50, 60, 70 and 80uC. The current and potential noise signals were obtained each four hours during 15 days. These data were analysed in the time and frequency domains. A statistical analysis was made to obtain the localisation index and the resistance noise. Also, the Stern-Geary equation and the Faraday's law were used to determine the corrosion rates. A comparison of the corrosion rates obtained from ENT and WLM showed the same tendency with temperature, but a difference of one order of magnitude was seen. The results of the corrosion rates from ENT and WLM presented a good agreement with the inverse noise resistance results. SEM analyses of the corroded samples together with atomic absorption analysis of corrosion products are also presented.

show abstract

Section: Electrochemical Noise Techniquementioning

confidence: 97%

Corrosion study of SS-316L exposed to LiBr–H₂O solution applying electrochemical techniques and weight loss method

Cuevas-Arteaga¹,

Guzmán²

2009

Corrosion Engineering, Science and Technology

View full text Add to dashboard Cite

show abstract

“…The first papers concerning the use of electrochemical noise in corrosion were published as early as the sixties [1,2] and especially since 1990 the technique has been developed and used in a number of applications [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Corrosion monitoring in a straw‐fired power plant using an electrochemical noise probe

Cappeln¹,

Bjerrum

Petrushina

2007

Materials & Corrosion

View full text Add to dashboard Cite

Electrochemical Noise Measurements have been carried out in situ in a straw-fired power plant using an experimental probe constructed from alumina and AISI 347 steel. Based on a framework of controlled laboratory experiments it has been found that electrochemical noise has the unique ability to provide in-situ monitoring of intergranular corrosion in progress. The probe had a lifetime of two months. It was shown that down-time corrosion in the boiler was negligible. Electrochemical noise data indicated that metal temperatures around 590 C should be avoided as the intergranular corrosion is at an increased level at this temperature, most likely because of favorable conditions for molten salt film condensation.

show abstract

“…The noise signals also show some cathodic current peaks, as evidence that material is tending to passivate, especially at the end of the exposure (15 th and 19 th days). It is also possible to observe that the behavior of transients present a sudden increase in current accompanied with a sudden decrease in potential with their corresponding recovery, which, as it has been said, it can be interpreted as the rupture of the metallic oxide film or localized corrosion events(9,10). Even though it is feasible to observe several transients in all the time series, it is also possible to observe random oscillations of low amplitudes, as evidence of mixed corrosion process(11,12).…”

mentioning

confidence: 99%

Corrosion Performance of SS-304L Exposed to LiBr-H2O Solution at 70{degree sign}C Applying the Electrochemical Noise Technique, Polarization Curves and Optical Transmitance Measurements.

2007

View full text Add to dashboard Cite

A corrosion study of SS-304L was carried out exposing the material to LiBr-H2O solution 50% (wt.) at 70{degree sign}C for 20 days, applying the electrochemical noise technique and polarization curves. The aim of this work was to determine the corrosion rate and the type of corrosion of SS-304L. The corrosion evaluation was supported by optical observations of corroded specimens and EDX analysis of corrosion products. The dissolved corrosion products in LiBr solution were also analyzed by the atomic absorption technique. To obtain the corrosion rates, the noise resistance from ENT was calculated, and then the Stern-Geary equation and the Faraday Law were used. In general, the results of corrosion rates showed an oscillatory behavior, obtaining a cumulative mass loss of 6.11 mg/cm2. The electro-chemical signals showed important evidences of localized corrosion, showing significant transients of high magnitude, but also low amplitude and high frequency noise. The pitting indexes mainly lie in the mixed corrosion zone, being in agreement with visual observations of corroded samples. Optical transmittance measurements of corrosive solution with dissolved Fe, Cr, and Ni species are also presented.

show abstract

Electrochemical monitoring of high temperature corrosion processes

Cited by 25 publications

References 0 publications

Corrosion study of SS-316L exposed to LiBr–H₂O solution applying electrochemical techniques and weight loss method

Corrosion study of SS-316L exposed to LiBr–H₂O solution applying electrochemical techniques and weight loss method

Corrosion monitoring in a straw‐fired power plant using an electrochemical noise probe

Corrosion Performance of SS-304L Exposed to LiBr-H2O Solution at 70{degree sign}C Applying the Electrochemical Noise Technique, Polarization Curves and Optical Transmitance Measurements.

Contact Info

Product

Resources

About

Electrochemical monitoring of high temperature corrosion processes

Cited by 25 publications

References 0 publications

Corrosion study of SS-316L exposed to LiBr–H2O solution applying electrochemical techniques and weight loss method

Corrosion study of SS-316L exposed to LiBr–H2O solution applying electrochemical techniques and weight loss method

Corrosion monitoring in a straw‐fired power plant using an electrochemical noise probe

Corrosion Performance of SS-304L Exposed to LiBr-H2O Solution at 70{degree sign}C Applying the Electrochemical Noise Technique, Polarization Curves and Optical Transmitance Measurements.

Contact Info

Product

Resources

About

Corrosion study of SS-316L exposed to LiBr–H₂O solution applying electrochemical techniques and weight loss method

Corrosion study of SS-316L exposed to LiBr–H₂O solution applying electrochemical techniques and weight loss method