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BS ISO 23449:2020

$142.49

Corrosion of metals and alloys. Multielectrode arrays for corrosion measurement

Published By Publication Date Number of Pages
BSI 2020 30
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This document specifies the methodology of using multielectrode arrays for the measurement of the corrosion, especially localized corrosion, of metals and alloys. It can be used as a powerful tool for studying the initiation and propagation processes of localized corrosion. It is also a useful tool for long-term corrosion monitoring in the field, especially for localized corrosion, and for obtaining high throughput results for the evaluation of metals with different compositions and/or physical properties in different environments and the screening of a large number of inhibitors. Additionally, the galvanic coupling current and potential distribution of dissimilar metal parings can be assessed by multielectrode arrays. Multielectrode arrays can be implemented in full-immersion, thin-film, spray and alternating wet–dry cycle exposures.

This document is not intended to be used for measurements of corrosion caused by a non-electrochemical mechanism.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
11 4 Principle
4.1 Multielectrode arrays
4.2 Coupled multielectrode array (CMA)
12 4.3 Multielectrode array with closely packed electrodes for studying spatiotemporal behaviour of localized corrosion
13 4.4 Coupled multielectrode array sensor (CMAS)
4.4.1 CMAS for corrosion monitoring
14 4.4.2 CMAS used without polarization to measure corrosion rate at free corrosion potential
4.4.3 CMAS used to evaluate the effectiveness of cathodic protection and the effect of stray current
15 4.5 Multielectrode arrays for high throughput measurements
4.6 Multielectrode arrays for other applications
16 5 Instrumentation
5.1 Potential measurement
5.2 Coupling current measurement
17 5.3 Effective coupling of individual electrodes
5.3.1 Coupling with multichannel ZVA
18 5.3.2 Coupling with wires and measuring current with a single ZVA
6 Fabrication of multielectrode array
6.1 Electrode preparation
6.2 Number of electrodes
19 6.3 Mounting of electrodes
6.4 Surface coating on electrodes for preventing crevice corrosion
6.5 Electrode configuration
6.6 Size of electrodes
20 6.7 Spacing of electrodes for spatiotemporal studies
6.8 Spacing of electrodes for corrosion monitoring in oil and gas application
6.9 Size and spacing of the electrodes for high throughput studies
7 Test procedure
21 8 Test report
22 Annex A (informative) Typical results from multielectrode array with closely packed electrodes for studying spatiotemporal behaviour of localized corrosion
23 Annex B (informative) Typical results from a CMAS for corrosion monitoring
25 Annex C (informative) Example reports
26 Bibliography
BS ISO 23449:2020
$142.49