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Abstract

Novel Research in Sciences

Corrosion Monitoring of Austenitic and Super Austenitic Stainless-Steel Coupons in a Biodiesel Plant

  • Open or CloseCEAS Torres1, TE Santos2 and VFC Lins2*

    1Petrobras, Avenida das Indústrias 531, Brazil

    2Chemical Engineering Department, Brazil

    *Corresponding author:VFC Lins, Corrosion and Surface Engineering Laboratory, Chemical Engineering Department, Federal University of Minas Gerais, Brazil

Submission: November 21, 2019;Published: December 06, 2019

DOI: 10.31031/NRS.2025.16.000546

ISSN 2639-0612
Volume16 Issue4

Abstract

Corrosion monitoring of austenitic stainless steels was performed in a biodiesel plant by using corrosion coupons due to the generalized corrosion observed in stainless steel. Corrosion resistance of AISI 304L, AISI 316L, AISI 317L and AISI 904L stainless steels was evaluated downstream of the hydrochloric acid insertion site in the biodiesel and glycerin streams, between static mixer and decanter (biodiesel circuit point 1) and between static mixer and a heat exchange (in glycerin circuit point 2). AISI 317L presented a good corrosion resistance at monitoring point number 1. At monitoring point 2, AISI 317L steel performed better than AISI 904L. AISI 317L was selected as pipe material to be used downstream of the insertion point of the hydrochloric acid solution into the biodiesel and glycerin stream.

Keywords:Corrosion monitoring; Corrosion coupons; AISI 316L steel; AISI 317L steel; Biodiesel plant

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