Method of retarding corrosion of metal surfaces in contact with boiler water systems which corrosion is caused by dissolved oxygen
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United States of America Patent
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Feb 25, 1992
Grant Date -
N/A
app pub date -
Feb 21, 1991
filing date -
Feb 21, 1991
priority date (Note) -
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Abstract
New oxygen scavengers for boiler waters have been discovered, which oxygen scavengers are based upon N,N,N',N'-tetra substituted phenylenediamines. These compounds provide oxygen scavenging capabilities, metal passivating capabilities, volatility such that condensate systems in an operating boilder are protected, and may be formulated with other oxygen scavengers and other common treatment agents used in boiler waters. The preferred tetra substituted phenylenediamines are N,N,N', N'-tetramethyl-1,4-phenylenediamines, or its precursors.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- NALCO CHEMICAL COMPANY
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Harder, Scott R | Naperville, IL | 3 | 53 |
Pierce, Claudia C | Lisle, IL | 16 | 235 |
Soderquist, Cynthia A | Bolingbrook, IL | 7 | 144 |
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