Composite coating having enhanced corrosion resistance

Details Composite coating having enhanced corrosion resistance Composite coating having enhanced corrosion resistance

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.

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