Electrochemical Study of UNS S32550 Super Duplex Stainless Steel Corrosion in Turbulent Seawater Using the Rotating Cylinder Electrode

Autor:	Frank C. Walsh, B.D. Barker, G. Kear
Rok vydání:	2004
Předmět:	Materials science Passivation General Chemical Engineering Alloy Metallurgy General Chemistry engineering.material Corrosion Cathodic protection Electrode engineering Pitting corrosion General Materials Science Polarization (electrochemistry) Voltammetry
Zdroj:	CORROSION. 60:561-572
ISSN:	1938-159X 0010-9312
DOI:	10.5006/1.3287760
Popis:	The cathodic and anodic characteristics of freshly polished and pre-reduced UNS S32550 (ASTM A479) super duplex stainless steel in a filtered and conductivity-adjusted seawater have been investigated under controlled flow conditions. A rotating cylinder electrode was used together with both steady and non-steady-state voltammetry and a potential step current transient technique to investigate the electrode reactions in the fully characterized electrolyte. Both oxygen reduction and hydrogen evolution were highly irreversible and the material exhibited excellent passivation and repassivation kinetics. Relative corrosion rates were derived and the corrosion mechanism of the alloy was found to be completely independent of the mass-transfer effects, which can contribute to flow-induced corrosion.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6606c1df5ab550388e13dffca766f83a https://doi.org/10.5006/1.3287760 Zobrazit plný text záznamu