Metal treatment – Compositions – Heat treating
Patent
1987-02-06
1988-10-25
Silverberg, Sam
Metal treatment
Compositions
Heat treating
4284721, C23C 2232
Patent
active
047801530
ABSTRACT:
A coating composition is now provided which can have a great number of desirable coating characteristics, when the composition is applied and cured on a metal substrate. Moreover, the coating composition has applicability to a great variety of metal substrates. Such substrates include base metal such as steel as well as metal coated substrates such as zinc electroplated steel. Furthermore, the coating compositions can be useful when applied to substrates sensitive to elevated cure temperature, e.g., annealed steel. In one important aspect the composition can contain hexavalent-chromium-providing substance in mixture with cobalt compound. Particulate metal may be present in the composition. A composition furthermore most desirably contains a special organic acid/alcohol reducing agent combination for the hexavalent chromium. The composition can provide a low-cure coating on a metal substrate, which can then translate into higher production line speeds as when used for coating of metal coils.
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Dorsett Terry E.
Guhde Donald J.
Freer John J.
Silverberg Sam
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