Exposure tests of CuZn21Si3P in drinking water and dezincification test solution have revealed good dezincification resistance of the lead‐free brass CuZn21Si3P. To clarify the underlying mechanism, electrochemical measurements in tap water and surface characterisation of samples exposed to drinking water were performed. Open circuit potential measurements, electrochemical impedance spectroscopy and micro‐electrochemical polarisation curves, as well as light‐microscopy, X‐ray diffraction and Auger electron spectroscopy measurements reveal details on the corrosion behaviour and scale formation. Microstructural effects, electrochemical behaviour of the separate phases, and the role of the alloyed phosphorous in the dezincification process could be elucidated. Conclusively, a corrosion mechanism is proposed, that unites and explains the findings of long‐term exposure.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.