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\u2013dry cycle exposures.<\/p>\n
This document is not intended to be used for measurements of corrosion caused by a non-electrochemical mechanism.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | National foreword <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 4 Principle 4.1 Multielectrode arrays 4.2 Coupled multielectrode array (CMA) <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 4.3 Multielectrode array with closely packed electrodes for studying spatiotemporal behaviour of localized corrosion <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 4.4 Coupled multielectrode array sensor (CMAS) 4.4.1 CMAS for corrosion monitoring <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 4.5 Multielectrode arrays for high throughput measurements 4.6 Multielectrode arrays for other applications <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 5 Instrumentation 5.1 Potential measurement 5.2 Coupling current measurement <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 5.3 Effective coupling of individual electrodes 5.3.1 Coupling with multichannel ZVA <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6.3 Mounting of electrodes 6.4 Surface coating on electrodes for preventing crevice corrosion 6.5 Electrode configuration 6.6 Size of electrodes <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 8 Test report <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Annex A (informative) Typical results from multielectrode array with closely packed electrodes for studying spatiotemporal behaviour of localized corrosion <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Annex B (informative) Typical results from a CMAS for corrosion monitoring <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Annex C (informative) Example reports <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Corrosion of metals and alloys. Multielectrode arrays for corrosion measurement<\/b><\/p>\n |