Process and composition for protecting chrome steel
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United States of America Patent
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Jun 9, 1992
Issued Date -
N/A
app pub date -
Aug 1, 1990
filing date -
Aug 14, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A composition and method for inhibiting the corrosion of steel containing greater than about 9% chromium in the presence of at least one mineral acid, especially at temperatures above 250.degree. F. The composition is made of a corrosion inhibitor selected from phenyl ketone, phenyl ketone with a quaternary salt of a nitrogen-containing heterocyclic aromatic compound, or cinnamaldehyde with a quaternary salt of a nitrogen-containing heterocyclic aromatic compound and an acid soluble metal from antimonium or bismuth.
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