Publication detail

Corrosion Resistance of Cast Duplex Steels

MÜLLER, P. PERNICA, V. KAŇA, V.

Original Title

Corrosion Resistance of Cast Duplex Steels

Type

journal article in Web of Science

Language

English

Original Abstract

The aim of this work is to investigate the resistance of cast duplex (austenitic-ferritic) steels to pitting corrosion with respect to the value of PREN (Pitting Resistance Equivalent Number). Pitting corrosion is one of the most common types of corrosion of stainless steels. In most cases, it is caused by the penetration of aggressive anions through the protective passive layer of the steel, and after its disruption, it leads to subsurface propagation of corrosion. The motivation for the research was a severe pitting corrosion attack on the blades of the gypsumcalcium water mixer in a thermal power plant operation. In order to examine the corrosion resistance, 4 samples of 1.4517 steel with different concentrations of alloying elements (within the interval indicated by the steel grade) and thus with a different PREN value were cast. The corrosion resistance of the samples was evaluated by the ASTM G48 - 11 corrosion test in a 6% aqueous FeCl3 solution at room and elevated solution temperatures. To verify the possible effect of different alloying element concentrations on the mechanical properties, the research was supplemented by tensile and Charpy impact tests. Based on the results, it was found that a significant factor in the resistance of duplex steels to pitting corrosion is the temperature of the solution. For the components in operation, it is therefore necessary to take this effect into account and thoroughly control and manage the temperature of the environment in which the components operate.

Keywords

Cast duplex steel; Pitting resistance equivalent number; Ferric chloride; Critical pitting temperature; Mechanical properties

Authors

MÜLLER, P.; PERNICA, V.; KAŇA, V.

Released

3. 8. 2022

Publisher

POLSKA AKAD NAUK, POLISH ACAD SCIENCES

Location

WARSZAWA

ISBN

2299-2944

Periodical

Archives of Foundry Engineering

Year of study

2022

Number

3

State

Republic of Poland

Pages from

5

Pages to

10

Pages count

6

URL

https://journals.pan.pl/dlibra/publication/140230/edition/123845/content

BibTex

@article{BUT182312,
  author="Peter {Müller} and Vítězslav {Pernica} and Václav {Kaňa}",
  title="Corrosion Resistance of Cast Duplex Steels",
  journal="Archives of Foundry Engineering",
  year="2022",
  volume="2022",
  number="3",
  pages="5--10",
  doi="10.24425/afe.2022.140230",
  issn="2299-2944",
  url="https://journals.pan.pl/dlibra/publication/140230/edition/123845/content"
}