Effects of Thermal Oxidation and Subsequent Pickling on Pitting Geometry of Austentitic Stainless Steels in Chloride Solutions
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Vesna Alar
Abstract
Harmful effects of thermal oxides formed on austenitic stainless steels (SS) like AISI 304 and 316L by heating in air or other oxidizing gases on their pitting liability in chloride solutions have been studied by pursuing geometric characteristics of corrosion process (pits density, their depths, and mouth areas, ie. penetrating and superficial detrimental consequences etc.). The possibility of preventing the decay of thermally oxidized austenitic SS by chemical removal (pickling) of oxides before exposure to chloride solutions was successfully applied on simple specimens but serious difficulties arose on welded parts and on parts exposed to other temperature gradients during manufacture or in exploitation.
Kurzfassung
In der diesem Beitrag zugrunde liegenden Studie wurden die schädlichen Auswirkungen von thermischen Oxiden, die sich durch Erhitzen in Luft auf austenitischen Stählen wie AISI 304 und 316 L bilden, hinsichtlich der Lochkorrosionsbeständigkeit untersucht, in dem den Charakteristika der Lochgeometrie (Lochdichte, Lochtiefe und Lochränder, also Durchdringung und schädliche Konsequenzen für die Oberfläche) nachgegangen wurde. Die Möglichkeit zur Prävention einer Schädigung von thermisch oxidierten austenitischen Stählen durch chemische Entfernung der Oxide (Beizen) vor der Exposition in den Chloridlösungen wurde erfolgreich an einfachen Proben nachgewiesen. Jedoch ergaben sich erhebliche Schwierigkeiten für geschweißte Teile und an solchen Proben, die anderen thermischen Gradienten während der Fertigung oder Produktion ausgesetzt waren
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© 2011, Carl Hanser Verlag, München
Articles in the same Issue
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- DIN EN ISO 6892-1:2009 Der Zugversuch — Erste Erfahrungen aus der praktischen Umsetzung der neuen Norm*
- EN ISO 6892-1:2009 Tensile Testing: Initial Experience from the Practical Implementation of the New Standard*
- Weld Metal Grain Refinement of Aluminium Alloy 5083 through Controlled Additions of Ti and B
- TIG Riveting of Temperature Sheath Microprobe
- Einfluss der Mikrostruktur auf den Druck- und Zug-E-Modul teilkristalliner Kunststoffe
- A Novel Approach for Quantitative Measurement of the Slag Penetration Area in Refractories by Using Computer Aided Image Analysis
- Effects of Thermal Oxidation and Subsequent Pickling on Pitting Geometry of Austentitic Stainless Steels in Chloride Solutions
- Plasmagestützte Ionisations-spektroskopie (PGIS) zur Materialanalyse
- Arbeitswalzen aus Keramik zum Walzen von dünnen Stahlfolien im 20-Walzen-Sendzimirgerüst
- Magnesium Applications for Fuel Economy and Energy Production
- The Investigation of Graphite Distribution on Diffusion Bonding of the AISI 1030 Low Carbon Steel with Nodular Cast Iron
- Kalender/Calendar
- Kalender
- Vorschau/Preview
- Vorschau
Articles in the same Issue
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- DIN EN ISO 6892-1:2009 Der Zugversuch — Erste Erfahrungen aus der praktischen Umsetzung der neuen Norm*
- EN ISO 6892-1:2009 Tensile Testing: Initial Experience from the Practical Implementation of the New Standard*
- Weld Metal Grain Refinement of Aluminium Alloy 5083 through Controlled Additions of Ti and B
- TIG Riveting of Temperature Sheath Microprobe
- Einfluss der Mikrostruktur auf den Druck- und Zug-E-Modul teilkristalliner Kunststoffe
- A Novel Approach for Quantitative Measurement of the Slag Penetration Area in Refractories by Using Computer Aided Image Analysis
- Effects of Thermal Oxidation and Subsequent Pickling on Pitting Geometry of Austentitic Stainless Steels in Chloride Solutions
- Plasmagestützte Ionisations-spektroskopie (PGIS) zur Materialanalyse
- Arbeitswalzen aus Keramik zum Walzen von dünnen Stahlfolien im 20-Walzen-Sendzimirgerüst
- Magnesium Applications for Fuel Economy and Energy Production
- The Investigation of Graphite Distribution on Diffusion Bonding of the AISI 1030 Low Carbon Steel with Nodular Cast Iron
- Kalender/Calendar
- Kalender
- Vorschau/Preview
- Vorschau