Bituminous paints

At first sight, the answer would seem to be to increase the thickness of the zinc layer. This is not easily done, however, because the hot dipping process used for galvanising is not sufficiently adjustable and electroplating the zinc onto the steel sheet increases the production cost considerably. Painting the sheet (for example, with a bituminous paint) helps to reduce the loss of zinc considerably, but at the same time should vastly decrease the area available for the cathodic protection of the steel and if a scratch penetrates both the paint and the zinc, the exposed steel may corrode through much more quickly than before. 

Moisture-curing polyurethane paints and bituminous paints, specially formulated for the purpose, are also suited for application to damp substrates other polyurethane paints should not even be applied to dry surfaces if the relative humidity is high. 

Should an old bituminous paint layer have to be recoated, this should be done only with another bituminous paint, unless the surface is first insulated with one of the special primers which are available for the purpose. Bleeding and premature checking may otherwise occur. 

Unless some external shock source was employed, it was found that molten aluminum had to reach the vessel bottom before an explosion could occur. In these cases, oiganic coatings and paints (except silicones) prevented explosions. Many coatings were studied (see, in particular, Hess et al., 1980) and, when evaluated on many tests of applicability, durability, and nonexplosive characteristics, it was recommended that epoxy, coal-tar epoxy, and bituminous paints be used. Silicone, graphite, and inorganic coatings, in general, did not prevent explosions. 

The chambers are made of concrete or of welded lead sheets. The inside is coated with a bituminous paint. Lead chambers arc preferred because of their higher heat conductivity. They are fixed in a steel structure (similar to chambers used for the production of sulphuric acid) and are generally 1.2 to 2.5 m... 

S/B, concrete sealers sag control agent, bituminous paints Lanco A1602... 

Agar Aloe barbadensis extract Aloe extract Aluminum silicate Galactomannan thickener, bituminous paints Dihydrogenated tallow benzylmonium hectorite thickener, bleaches Lauramine oxide thickener, blooming bath oils Myreth-3 myristate thickener, bonding agents Acrylamides copolymer thickener, butyl caulks... 

The use of materials such as bituminous paint, for example, would not be suitable as the paint layer thickness would be sufficient to Inhibit the transfer of prestress. The use of chemical release agents Is discussed In Section 7.6.3. 

Rivington (1901) lists Indestructible Paint which he says is available in three colours (bronze-green, chocolate and black) as enamel paints, made from zinc oxides or lead oxides groimd with oil and petrolemn spirit, with bitumen added. These paints were useful for painting industrial surfaces subject to the attack of steams, acids and alkalis or to the fumes of gas and produced a hard, washable surface. Rivington goes on to discuss bituminous paints in some detail. They are made fiom vegetable bitumen, asphalte and mineral pitches dissolved in paraffin, petroleum or... 

BITUMINOUS PAINT. Laboratoiy tests have shown that bituminous paint is protective to aluminum alloys. See also Ref (1) p. 127, (3) pp. 218,221, (4)p. 141. 

Bitumastic - 23,811 Bitumen - 63 Bituminous paint - 613 Black ash (see Barium sulfide)... 

Uses Wetting and dispersing agent for pigmented air-dry and sieving paints and lacquers, e g., anticorrosive paints, alkyd enamels, zinc paints, marine paints, bituminous paints, epoxy paints, putty, printing inks, pigment cones. 

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