Group IV-A protective films for solid surfaces

Details Group IV-A protective films for solid surfaces Group IV-A protective films for solid surfaces

1999-04-30

2000-07-04

Green, Anthony

Compositions: coating or plastic

Coating or plastic compositions

Corrosion inhibiting coating composition

106 1411, 106 1412, 106 1413, 106 1414, 106 1415, 106 1416, 106 1417, 106 1444, 148243, 148247, 148275, C23C 2205

Patent

active

060833092

ABSTRACT:
Compositions and processes are disclosed for producing improved electrical insulation, environmental protection, corrosion resistance and improved paint adhesion for metals; e.g., ferrous, aluminum, or magnesium alloys; as well as other substrates such as anodized metals, glasses, paints, plastics, semiconductors, microprocessors, ceramics, cements, silicon wafers, electronic components, skin, hair, and wood upon contact. The compositions and processes comprise use of one or more Group IV-A metals, such as zirconium, in combination with one or more non-fluoanions while fluorides are specifically excluded from the processes and compositions above certain levels. The processes can contain pretreatment stages that serve to activate a substrate surface and/or promote formation of metal- and mixed-metal oxide matrices through use of an oxygen donor. The compositions are at a pH below about 5.0 and are preferably in a range between about 1.0 and about 4.0. The coatings may contain additives such as surfactants, sequestering agents, or other organic additives for improved corrosion protection and paint adhesion. The substrate may be treated by immersion, spray, fogging or rollcoat and other common application techniques.

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