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Influence of finishing on corrosion resistance of surface hardened stainless steels

Einfluss der Oberflächenveredlung auf die Korrosionsbeständigkeit oberflächengehärteter nichtrostender Stähle

  • This paper compares the surface morphology of differently finished austenitic stainless steel AISI 316L, also in combination with low temperature carburization. Milled and tumbled surfaces were analyzed by means of corrosion resistance and surface morphology. The results of potentiodynamic measurements show that professional grinding operations with SiC and Al2O3 always lead to a better corrosion resistance of low temperature carburized surfaces compared to the untreated reference in the used acidified chloride solution. Big influence on the corrosion resistance of vibratory ground or tumbled surfaces has the amount of plastic deformation while machining, that has to be kept low for austenitic stainless steels. Due to the high ductility, plastic deformation can lead to the formation of meta stable pits that can be initiation points of corrosion. The formation of meta stable pits can be aggravated by low temperature diffusion processes.

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Author:Andreas Karl, M. Wägner, A. Emmel, Arnulf HörtnaglGND, Paul GümpelGND
Parent Title (English):8th European Stainless Steel & Duplex Stainless Steel Conference 2015, Graz, AT, Apr 28-30
Document Type:Conference Proceeding
Year of Publication:2015
Release Date:2018/09/12
First Page:282
Last Page:287
Relevance:Keine peer reviewed Publikation (Wissenschaftlicher Artikel und Aufsatz, Proceeding, Artikel in Tagungsband)
Open Access?:Nein