Stock material or miscellaneous articles – Composite – Of metal
Patent
1975-03-20
1977-04-26
Hoffman, James R.
Stock material or miscellaneous articles
Composite
Of metal
427374B, 427380, B05D 714, B05D 138, B32B 1504
Patent
active
040202208
ABSTRACT:
Composite coatings, of an undercoating plus a subsequent coating each containing a multi-valent metal, can achieve excellent corrosion protection when the coatings are subjected to appropriate heat curing. Such curing for a subsequent coating is generally under conditions unlike those of a similar, or the same, undercoating. Firstly, control over cure temperature and time is exercised with the undercoating to virtually eliminate its water sensitivity. Then for example, water quenching may be used in cooling. Next, differing cure conditions for the topcoating are used to favor augmented corrosion resistance for the composite.
REFERENCES:
patent: 3956531 (1976-05-01), Church et al.
Diamond Shamrock Corporation
Freer John J.
Hoffman James R.
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