The multielectrode array technology

The multielectrode array technology has been used to study electrochemical behaviours and localized corrosion of metals and alloys since the 1990s 1-2. It has been demonstrated that the multielectrode arrays are highly powerful tools for studying the spatiotemporal behaviour of metals in laboratories3-13 and for monitoring non-uniform corrosion, especially localized corrosion in laboratories and plants 14. Multielectrode arrays are also used as high-throughput probes for studying the statistical behaviour of metal corrosion15 and evaluation of inhibitors16. The goal of this standard is designed to outline the requirements and procedures for conducting corrosion measurements using multielectrode arrays.This standard specifies the methodology of using multielectrode arrays for 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 standard is not intended to be used for measurements of corrosion caused by non-electrochemical mechanism.