Ways of increasing the effectiveness of the electrochemical noise method for assessment of organic coatings on metal

S Jamali; Douglas J Mills; Christopher Paul Woodcock

doi:10.1149/1.3453611

Ways of increasing the effectiveness of the electrochemical noise method for assessment of organic coatings on metal

S Jamali, Douglas J Mills, Christopher Paul Woodcock

Research output: Contribution to Journal › Article

Abstract

The most practically useful arrangement for making Electrochemical Noise Measurements is NOCS. Previously reported work using NOCS suggested that the arrangement had somewhat increased sensitivity to error (drift, spikes etc) in the value of noise resistance (Rn) that was calculated. The current work looked to address this by using an improved data analysis approach using a drift removal programme. Also Rsn (spectral noise resistance at 0.002Hz) has been calculated using either the MEM or FFT methods and compared with (Rn)To investigate possible ambiguity arising from interrogating three separate areas, samples with known values of resistance (high, medium and low) were joined in combinations and Rn measured. It was found that the cell connected to the reference input tended to dominate ie potential noise prevails over current noise. With some refinement, the NOCS method should soon be a practical method for field application.

Original language	English
Pages (from-to)	115-125
Number of pages	11
Journal	ECS Transactions
Volume	24
Issue number	1
DOIs	https://doi.org/10.1149/1.3453611
Publication status	Published - 1 Jan 2010

Keywords

Electrochemical noise measurement

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10.1149/1.3453611

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title = "Ways of increasing the effectiveness of the electrochemical noise method for assessment of organic coatings on metal",

abstract = "The most practically useful arrangement for making Electrochemical Noise Measurements is NOCS. Previously reported work using NOCS suggested that the arrangement had somewhat increased sensitivity to error (drift, spikes etc) in the value of noise resistance (Rn) that was calculated. The current work looked to address this by using an improved data analysis approach using a drift removal programme. Also Rsn (spectral noise resistance at 0.002Hz) has been calculated using either the MEM or FFT methods and compared with (Rn)To investigate possible ambiguity arising from interrogating three separate areas, samples with known values of resistance (high, medium and low) were joined in combinations and Rn measured. It was found that the cell connected to the reference input tended to dominate ie potential noise prevails over current noise. With some refinement, the NOCS method should soon be a practical method for field application.",

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T1 - Ways of increasing the effectiveness of the electrochemical noise method for assessment of organic coatings on metal

AU - Jamali, S

AU - Mills, Douglas J

AU - Woodcock, Christopher Paul

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N2 - The most practically useful arrangement for making Electrochemical Noise Measurements is NOCS. Previously reported work using NOCS suggested that the arrangement had somewhat increased sensitivity to error (drift, spikes etc) in the value of noise resistance (Rn) that was calculated. The current work looked to address this by using an improved data analysis approach using a drift removal programme. Also Rsn (spectral noise resistance at 0.002Hz) has been calculated using either the MEM or FFT methods and compared with (Rn)To investigate possible ambiguity arising from interrogating three separate areas, samples with known values of resistance (high, medium and low) were joined in combinations and Rn measured. It was found that the cell connected to the reference input tended to dominate ie potential noise prevails over current noise. With some refinement, the NOCS method should soon be a practical method for field application.

AB - The most practically useful arrangement for making Electrochemical Noise Measurements is NOCS. Previously reported work using NOCS suggested that the arrangement had somewhat increased sensitivity to error (drift, spikes etc) in the value of noise resistance (Rn) that was calculated. The current work looked to address this by using an improved data analysis approach using a drift removal programme. Also Rsn (spectral noise resistance at 0.002Hz) has been calculated using either the MEM or FFT methods and compared with (Rn)To investigate possible ambiguity arising from interrogating three separate areas, samples with known values of resistance (high, medium and low) were joined in combinations and Rn measured. It was found that the cell connected to the reference input tended to dominate ie potential noise prevails over current noise. With some refinement, the NOCS method should soon be a practical method for field application.

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U2 - 10.1149/1.3453611

DO - 10.1149/1.3453611

M3 - Article

SN - 1938-5862

VL - 24

SP - 115

EP - 125

JO - ECS Transactions

JF - ECS Transactions

IS - 1

ER -

Ways of increasing the effectiveness of the electrochemical noise method for assessment of organic coatings on metal

Abstract

Keywords

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