Experiments were performed in which electrically heated OFHC Cu tubes were exposed to flowing high-velocity methane fuels. Significant corrosion was produced during these tests as indicated by recession of the inside tube walls. No corrosion was, however, observed from elevated temperature static exposures of copper specimens to high-pressure liquid natural gas (LNG) and high-purity methane fuels. Mechanisms postulated to explain this corrosion are: sulfur embrittlement, (2) corrosion interactions with high AC currents, (3) erosion-corrosion, (4) electrochemical corrosion, (5) zeta corrosion, and (6) mercury corrosion. Each of these mechanisms is reviewed in this paper.
Subject
Embrittlement,
Sulfur,
Oxides,
Metal surfaces,
Tubes,
Walls,
Corrosion attacks,
Mercury,
Methane,
Heat,
Copper,
Hydrocarbons,
Hydrogen
National Association of Corrosion Engineers
1989
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