<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Exhaust systems are susceptible to in-service wear because of their exposition to the very aggressive corrosive environment. Various stainless steels grades (mostly ferritic and austenitic, but also martensitic and duplex) and protective coatings are currently used for exhaust system elements to increase their aestetics and corrosion resistance. This article focuses on evaluation and comparison of the common corrosion properties of two stainless steels with different microstructures (ferritic and austenitic) used for exhaust system components at the low ambient temperature (35 °C). An aggressive acidic corrosion solution for electrochemical cyclic potentiodynamic tests (ASTM G61) was chosen to simulate partly inner (condensate) and also external environment (reaction of exhaust gases with water, chlorides in solution after winter road maintenance). Exposure tests of the pitting corrosion resistance were performed according to ASTM G48 standard method.</p>
</abstract>

Exhaust systems are susceptible to in-service wear because of their exposition to the very aggressive corrosive environment. Various stainless steels grades (mostly ferritic and austenitic, but also martensitic and duplex) and protective coatings are currently used for exhaust system elements to increase their aestetics and corrosion resistance. This article focuses on evaluation and comparison of the common corrosion properties of two stainless steels with different microstructures (ferritic and austenitic) used for exhaust system components at the low ambient temperature (35 °C). An aggressive acidic corrosion solution for electrochemical cyclic potentiodynamic tests (ASTM G61) was chosen to simulate partly inner (condensate) and also external environment (reaction of exhaust gases with water, chlorides in solution after winter road maintenance). Exposure tests of the pitting corrosion resistance were performed according to ASTM G48 standard method.

Corrosion Properties Of 1.4512 Ferritic And 1.4404 Austenitic Steels For The Automotive Industry

System Safety: Human - Technical Facility - Environment

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Exhaust systems are susceptible to in-service wear because of their exposition to the very aggressive corrosive environment. Various stainless steels grades...

Corrosion Properties Of 1.4512 Ferritic And 1.4404 Austenitic Steels For The Automotive Industry

Published Online: Mar 28, 2019

Page range: 745 - 752

Received: Nov 12, 2018

Accepted: Dec 21, 2018

DOI: https://doi.org/10.2478/czoto-2019-0095

Keywords
Corrosion, Ferritic stainless steel, Austenitic stainless steel, Cyclic potentiodynamic test, Exposure test

© 2019 Lenka Markovičová et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Corrosion Properties Of 1.4512 Ferritic And 1.4404 Austenitic Steels For The Automotive Industry

Published Online: Mar 28, 2019

Page range: 745 - 752

Received: Nov 12, 2018

Accepted: Dec 21, 2018

DOI: https://doi.org/10.2478/czoto-2019-0095

KeywordsCorrosion, Ferritic stainless steel, Austenitic stainless steel, Cyclic potentiodynamic test, Exposure test

© 2019 Lenka Markovičová et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
Corrosion, Ferritic stainless steel, Austenitic stainless steel, Cyclic potentiodynamic test, Exposure test