Compositions – Preservative agents – Anti-corrosion
Patent
1997-09-24
1999-02-16
Wu, Shean C.
Compositions
Preservative agents
Anti-corrosion
2523893, 106 1439, 106 1444, 106 117, 106 118, 106 105, 106641, 106643, C09K 300, C23F 1118
Patent
active
058716688
ABSTRACT:
A system is disclosed for inhibiting the corrosion of ferrous and other metals by passivating the metals. The system includes novel buffered compositions which may be applied to metal products for preventing or retarding corrosion and methods for applying the buffered compositions to metal products such that corrosion protection of the products is achieved through passivation. The methods include an in-situ application to existing structures with metal reinforcement as well as applications to metal products during manufacture. Generally, the compositions may be in various forms and comprise a carrier component and one or more pH buffer components. The buffer is selected to retain the proximity of the metal at a pH at which the metal is passive to corrosion. The compositions are environmentally friendly and are capable of replacing chromates which have been traditionally used with zinc and zinc alloys to inhibit corrosion of metals but which are potentially harmful to the environment.
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Wolkomir, Richard, "Inside the Lab and OUt,
Dalton William M.
Heimann Robert L.
Webb David R.
Boyer Michael K.
Elisha Technologies Co. L.L.C.
Wu Shean C.
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