Compositions – Etching or brightening compositions
Patent
1990-11-19
1992-02-04
Lieberman, Paul
Compositions
Etching or brightening compositions
252 76, 252396, 422 17, C09K 500, C23F 1112
Patent
active
050857932
ABSTRACT:
A corrosion-inhibited antifreeze composition is disclosed. Specifically, the antifreeze composition comprises a major portion of a liquid alcohol freezing point depressant and a minor portion of at least one hydroxyl-substituted aromatic carboxylic acid having the hydroxyl radical disposed proximate to the carboxylic radical. The above described acid is employed as a corrosion inhibitor. Other conventional corrosion inhibitors may be employed in conjunction with the acids.
In another embodiment, the present invention relates to a process for inhibitig the corrosion of metals present in the cooling system of an internal combustion engine which comprises intimately contacting the metal surface to be inhibited against corrosion with the antifreeze composition described above. Most preferably, the target substrate is high lead solder.
REFERENCES:
patent: 3240708 (1966-03-01), Dulat et al.
patent: 4234440 (1980-11-01), Hirozawa et al.
patent: 4434066 (1984-02-01), Lewis
patent: 4587028 (1986-05-01), Darden
Burns Jeffrey M.
Larkin John M.
McCoy David R.
Sanderson John R.
Kulason Robert A.
Lieberman Paul
O'Loughlin James J.
Skane Christine A.
Texaco Chemical Company
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