Electrochemical Behavior of Various Kinds of Stainless Steels in a High-Temperature and High-Pressure Methanol Solution

Electrochemical Behavior of Various Kinds of Stainless Steels in a High-Temperature and High-Pressure Methanol Solution

The corrosion behavior of various kinds of stainless steels was investigated in a high-temperature and high-pressure methanol solution containing chloride ions for the selection of a reactor material for a decomposition system using subcritical or supercritical methanol. The anodic polarization beha...

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Bibliographic Details
Published in:Corrosion (Houston, Tex.) Vol. 64; no. 7; pp. 607 - 612
Main Authors: SHINTANI, D, ISHIDA, T, FUKUTSUKA, T, MATSUO, Y, SUGIDT, Y
Format: Journal Article
Language:English
Published: Houston, TX NACE International 01-07-2008
Subjects:
Alloys
Anodic polarization
Applied sciences
Chloride ions
Corrosion
Corrosion environments
Corrosion potential
Corrosion resistance
Corrosion resistant alloys
Corrosion resistant steels
Decomposition reactions
Electrochemical analysis
Electrochemistry
Electrode polarization
Exact sciences and technology
High temperature
Lithium
Lithium chloride
Low carbon steels
Metals. Metallurgy
Methanol
Moisture content
Morphology
Polarization
Stainless steel
Stainless steels
Supercritical fluids
Temperature
Water content
Austenitic stainless steel
Nickel base alloys
Temperature
UNS N10276
methanol solution
Type 316L stainless steel
Electrochemical corrosion
Corrosion potential
High temperature
Pinhole
high pressure
micropit
chloride ions
Alloy C-276
Stainless steel
Chlorides
Anodic polarization
Stainless steel-316L
Organic compounds
Methanol
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Summary:The corrosion behavior of various kinds of stainless steels was investigated in a high-temperature and high-pressure methanol solution containing chloride ions for the selection of a reactor material for a decomposition system using subcritical or supercritical methanol. The anodic polarization behavior of mild steel, Types 430 (UNS S43000), 316L (UNS S31603), and 310S (UNS S31008) stainless steels (SS), and Alloy C-276 (UNS N10276) was investigated in a deaerated, anhydrous methanol solution (water content: <0.05 wt%) containing 0.42 wt% lithium chloride (LiCl) at 323 K. Only Alloy C-276 exhibited a passive region, and Type 316L SS exhibited the best corrosion resistance among the stainless steels. A comparison of Type 316L SS with Alloy C-276 was made using corrosion potential (Ecorr) measurements at 323 K to 473 K, anodic polarization measurements at 423 K and 473 K, and surface morphology observation. Ecorr decreased and a broad passive region was observed in the anodic polarization at more than 423 K. At 473 K, both alloys exhibited similar polarization curves. The similarity indicated that corrosion resistance of Alloy C-276 was close to that of Type 316L SS.
ISSN:0010-9312
1938-159X
DOI:10.5006/1.3278496