Menu
Search
Filters
Close
Menu

51318-11040-Electrochemical noise measurements with dummy cells: Evaluation of a round-robin test series

Picture for Electrochemical noise measurements with dummy cells: Evaluation of a round-robin test series
Available for download

Round-robin (RR) tests on electrochemical noise (EN) measurements with dummy cells have been performed in the European Cooperative Group on Corrosion Monitoring of Nuclear Materials since 2006.

Product Number: 51318-11040-SG
Author: Hongpeng Zheng / Yawei Shao
Publication Date: 2018
Industry: Test Method
$0.00
$20.00
$20.00

Round-robin (RR) tests on electrochemical noise (EN) measurements with dummy cells have been performed in the European Cooperative Group on Corrosion Monitoring of Nuclear Materials since 2006. Dummy cells are composed of three resistors of equal value connected in a ‘star’ arrangement and employed in the conventional three electrode EN measurement setup using a zero-resistance ammeter. The use of dummy cells has the advantage of measuring voltage and current signals of reproducible amplitude contrary to corroding systems. The arrangement provides a well-defined source impedance and noise level, thereby allowing the testing of noise level and sensitivity of the measuring instrument, which is a potentiostat in most cases. Although the resistors used in dummy cells generate thermal noise of a very low level, as low as for passive electrodes, it is not expected that all instruments will be able to measure this noise. From the results of the three RR tests performed between 2014 and 2017 that are presented, it may be concluded that small improvements could observed compared to the very first RR campaigns, but that still only few commercially available instruments are able to perform fully valid electrochemical noise measurements and that better guidance to the users of such instruments is needed.

 

Key Words: round-robin, electrochemical noise, dummy cell, potentiostat

Round-robin (RR) tests on electrochemical noise (EN) measurements with dummy cells have been performed in the European Cooperative Group on Corrosion Monitoring of Nuclear Materials since 2006. Dummy cells are composed of three resistors of equal value connected in a ‘star’ arrangement and employed in the conventional three electrode EN measurement setup using a zero-resistance ammeter. The use of dummy cells has the advantage of measuring voltage and current signals of reproducible amplitude contrary to corroding systems. The arrangement provides a well-defined source impedance and noise level, thereby allowing the testing of noise level and sensitivity of the measuring instrument, which is a potentiostat in most cases. Although the resistors used in dummy cells generate thermal noise of a very low level, as low as for passive electrodes, it is not expected that all instruments will be able to measure this noise. From the results of the three RR tests performed between 2014 and 2017 that are presented, it may be concluded that small improvements could observed compared to the very first RR campaigns, but that still only few commercially available instruments are able to perform fully valid electrochemical noise measurements and that better guidance to the users of such instruments is needed.

 

Key Words: round-robin, electrochemical noise, dummy cell, potentiostat

Product tags
Also Purchased
Picture for Electrochemical Noise - Guidance for Improving Measurements and Data Analysis
Available for download

51318-11042-Electrochemical Noise - Guidance for Improving Measurements and Data Analysis

Product Number: 51318-11042-SG
Author: François Huet / Kieu Ngo
Publication Date: 2018
$20.00

Round-Robin tests on electrochemical noise between 2014 and 2017 showed that only very few commercial potentiostats can perform valid EN measurements. This paper is aimed at guiding users by providing the minimum knowledge for EN measurements
Picture for Advancement in Cathodic Disbondment Test Standard- NACE TM0115
Available for download

51318-11018-Advancement in Cathodic Disbondment Test Standard- NACE TM0115

Product Number: 51318-11018-SG
Author: Benjamin T. A. Chang / Dennis Wong
Publication Date: 2018
$20.00

Special enhancements: (1) use the high temperature reference electrode - Ag/AgCl; (2) define the test temperature measurement procedure; (3) check the accuracy of the reference electrode; (4) develop an inexpensive anode isolation method.
Picture for LONG-TERM FIELD TESTING OF CATHODIC PROTECTION EQUIPMENT IN SOIL AND MARINE ENVIRONMENT
Available for download

51318-11057-LONG-TERM FIELD TESTING OF CATHODIC PROTECTION EQUIPMENT IN SOIL AND MARINE ENVIRONMENT

Product Number: 51318-11057-SG
Author: Andrey V. Goncharov / Andrey V. Valyushok,
Publication Date: 2018
$20.00

Long-term (>1.5 years) field testing of reference electrodes and anodes are carried out on port facilities in Kozmino (marine conditions) and in Ural region (in soils). Experimental procedures and some observations made in course of the testing.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support