Effect of Carboxylic Acids on Corrosion of Type 410 Stainless Steel in Pyrolysis Bio-Oil

• Published in: Sustainability Vol. 14; no. 18; p. 11743
• Main Authors: Sulejmanovic, Dino, Keiser, James R, Su, Yi-Feng, Kass, Michael D, Ferrell, Jack R, Olarte, Mariefel V, Wade, John E, Jun, Jiheon
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.09.2022; MDPI
• Subjects: 09 BIOMASS FUELS; Acids; Alloys; Biomass; Capillary electrophoresis; carboxylic acid; Carboxylic acids; Chemical properties; Chemical research; Chromium; Corrosion; Corrosion effects; Corrosion tests; Corrosion, stainless steel, pyrolysis oil; Discount coupons; Formic acid; Functional groups; Hexanoic acid; MATERIALS SCIENCE; Oils & fats; Organic acids; Organic compounds; Phase separation; Polarity; Pyrolysis; pyrolysis bio-oils; Stainless steel; Steel; Steel, Stainless; United States; United States > US
• ISSN: 2071-1050; 2071-1050
• DOI: 10.3390/su141811743

Biomass-derived oils are renewable fuel sources and commodity products and are proposed to partially or entirely replace fossil fuels in sectors generally considered difficult to decarbonize such as aviation and maritime propulsion. Bio-oils contain a range of organic compounds with varying functional groups which can lead to polarity-driven phase separation and corrosion of containment materials during processing and storage. Polar compounds, such as organic acids and other oxygenates, are abundant in bio-oils and are considered corrosive to structural alloys, particularly to those with a low-Cr content. To study the corrosion effects of small carboxylic acids present in pyrolysis bio-oils, type 410 stainless steel (SS410) specimens were exposed in bio-oils with varying formic, acetic, propionic and hexanoic acid contents at 50 °C during 48 h exposures. The specific mass change data show a linear increase in mass loss with increasing formic acid concentration. Interestingly, a mild corrosion inhibition effect on the corrosion of SS410 specimens was observed with the addition of acetic, propionic and hexanoic acids in the bio-oil.