ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Investigation of the Active Dissolution Behaviour of a 22% Chromium Duplex Stainless Steel with Small Ruthenium Additions in Sulphuric Acid
J. H. PotgieterP. EllisA. Van Bennekom
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JOURNALS FREE ACCESS

1995 Volume 35 Issue 2 Pages 197-202

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Abstract

The dissolution behaviour of a 22% chromium duplex stainless steel with very low nitrogen content and containing various amounts of ruthenium was investigated. It was found that the ruthenium additions inhibits the anodic dissolution behaviour when active corrosion took place. Furthermore it was established that only the ferrite phase corrodes preferentially at various potentials in the active and passive regions, which is contrary to the behaviour of similar commercial duplex stainless steels with significant nitrogen contents, and which do not contain ruthenium.

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