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Electrochemical Corrosion Analysis Of Stainless Steels In LALM Pyrolysis Bio-Oil With Organic Corrodents

Picture for Electrochemical Corrosion Analysis Of Stainless Steels In LALM Pyrolysis Bio-Oil With Organic Corrodents
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Biomass-derived pyrolysis oils (bio-oils) are recognized as a renewable energy source that could
aid in the reduction of fossil fuel use. Bio-oils exhibit higher corrosivity to common ferrous alloys because the oils contain organic acids and water. A series of corrosion studies were previously performed to determine the corrosion rates of ferrous alloys exposed in bio-oils for a quantitative evaluation of the material compatibility. The key information from these previous studies is that ferrous alloys with more Cr, Ni, and Mo are needed for compatibility with bio-oils.

Product Number: 51322-17759-SG
Author: Jiheon Jun, Dino Sulejmanovic, James R. Keiser, Michael P. Brady, Michael D. Kass
Publication Date: 2022
Industries: Science of Corrosion , Corrosion Monitoring and Control , Coatings
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$20.00

Pyrolysis bio-oils are corrosive to low alloy steels, e.g., 2.25Cr-1Mo, 5Cr-1Mo, and 9Cr-1Mo
grades. To identify the alloys with sufficient bio-oil compatibility, several commercial stainless
steels were examined in bio-oil using electrochemical impedance spectroscopy to semi
quantitatively assess their corrosion resistance. Low-Ash Low-Moisture (LALM) bio-oil, produced
from a forest residue feedstock by the National Renewable Energy Laboratory in Golden, CO,
was used as a test liquid for electrochemical impedance spectroscopy measurements. Three
organic corrodents, formic acid, catechol, and lactobionic acid, were added into LALM bio-oil to
produce test liquids with intentionally increased corrosivity. Corrosion reaction resistance,
determined from the impedance data, was used to evaluate the corrosion compatibility of each
stainless steel in LALM bio-oil and LALM bio-oil + organic corrodent(s). The results from corrosion
reaction resistance indicated that the critical Cr content of stainless steels for corrosion resistance
would be greater than 14 wt % if Ni and Mo contents are low but can be as low as 12–13 wt %
with appreciable amounts of Ni and Mo.

Pyrolysis bio-oils are corrosive to low alloy steels, e.g., 2.25Cr-1Mo, 5Cr-1Mo, and 9Cr-1Mo
grades. To identify the alloys with sufficient bio-oil compatibility, several commercial stainless
steels were examined in bio-oil using electrochemical impedance spectroscopy to semi
quantitatively assess their corrosion resistance. Low-Ash Low-Moisture (LALM) bio-oil, produced
from a forest residue feedstock by the National Renewable Energy Laboratory in Golden, CO,
was used as a test liquid for electrochemical impedance spectroscopy measurements. Three
organic corrodents, formic acid, catechol, and lactobionic acid, were added into LALM bio-oil to
produce test liquids with intentionally increased corrosivity. Corrosion reaction resistance,
determined from the impedance data, was used to evaluate the corrosion compatibility of each
stainless steel in LALM bio-oil and LALM bio-oil + organic corrodent(s). The results from corrosion
reaction resistance indicated that the critical Cr content of stainless steels for corrosion resistance
would be greater than 14 wt % if Ni and Mo contents are low but can be as low as 12–13 wt %
with appreciable amounts of Ni and Mo.

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Effect Of Organic Acids In Pyrolysis Oils On The Corrosion Of Constructional Materials For Oil Storage And Transportation

Product Number: 51322-18054-SG
Author: Xue Han, Kaiyang Li, Yimin Zeng
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Due to the increase in world’s population and technologies, and the limited fossil fuel reserves, efforts have been taken to seek alternative energy resources, such as bioenergy that is produced from renewable biomass, to meet the increasing need for energy. The feedstocks for bioenergy production can include the waste biomass from forestry and agricultural sectors and various industries such as food processing industry and pulp and paper industry, making a profit while saving costs from waste management. 
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Electrochemical Behavior Of Transmission Pipeline Steels In Supercritical Carbon Dioxide

Product Number: 51322-17592-SG
Author: Zineb Belarbi, Lucas Teeter, Richard E. Chinn, Margaret Ziomek- Moroz, Ömer N. Doğan
Publication Date: 2022
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High-pressure steel pipeline is a common, cost-effective method for transporting CO2 from its point of capture to storage sites1. In pipeline transport systems, CO2 is mostly transported in its liquid or supercritical phase, depending on the operating pressure2,3, which requires compression of CO2 gas to a pressure above 80 bar (Figure 1) and avoid a two-phase flow regime in the steel pipelines. In the USA, the longest CO2 pipelines, which transport more than 40 MtCO2 per year from production point to sites in Texas, where the CO2 is used for enhanced oil recovery (EOR), operate in the “dense phase” mode and at ambient temperature and high pressure.
Picture for Efficacy Of MIL-DTL-5541 Compliant Non-Chromate Conversion Coating Repair Materials
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Efficacy Of MIL-DTL-5541 Compliant Non-Chromate Conversion Coating Repair Materials

Product Number: 51322-17625-SG
Author: David G. Enos, Derek Wichhart
Publication Date: 2022
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Chromate conversion coatings are relied upon to ensure the long-term corrosion performance and surface electrical properties of aluminum alloys, as well as to improve the bond strength and adhesive properties of organic coatings and adhesives. Chromate based chemistries have been all but eliminated in Europe, and it is believed the Environmental Protection Agency (EPA) will stage their elimination in the USA within the next 5 to 10 years. The development of chemistries to replace chromate has been a hot area of research for over 30 years, and now a series of commercial alternatives have become available. These new coatings differ in their chemistry and performance characteristics, as well as their functional limitations, from chromate.
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