Aluminum ground coats

Oxide s Ground coats Cover coats Aluminum enamels ... 

Aluminum does not require a ground coat. Enamel is generally applied by spraying, with firing accomplished by heating to 450-550°C (850-1040°F) for 2-10 min. 

MW 0/1mud Mica. Wei ground mica is used because of its unique properties, i.e.. luster, slip and sheen, and high aspect ratio. It is used in wallpaper and coated paper, nacreous pigments, as a coating for rubber, in ouidoor house paint, and in aluminum paints. Mica is used in all types of scalers for porous surfaces, such as vvallboard masonry, and concrete blocks, to reduce penetration and improve holdout and as a filler in plasties to improve its electrical and thermal resistance and its insulating qualities. See also Sealants. 

PORCELAIN ENAMEL. A substantially vitreous inorganic coating bonded to metal by fusion above 426 C (ASTM), Composed of various blends of low-sodium frit, clay, feldspar, and other silicates ground in a ball mill and sprayed onto a metal surface (steel, iron, or aluminum), to which it bonds firmly after firing, giving a glasslike fire-polished surface. 

Early experiments were concerned with the protection against water-vapor adsorption afforded a pair of soft steel electrodes by coating each with FEP Teflon resin. The two coated electrodes were cleaned as before, mounted in the gas cell, and then discharged with gaseous ions while the metal pins were grounded. The resulting contact potential difference was zero. The same result was obtained using a pair of resin-coated aluminum electrodes. 

Extraction of Cured, Modified Phenol-Formaldehyde Resins. A sample of the modified resin was spread as a thin coating on a sheet of aluminum foil and cured in an oven at 170 °C for 5 minutes. The cured resin was removed from the aluminum foil, weighed, and broken into small pieces that were placed in water (10 to 15 mL) for extraction at room temperature. After 1 to 2 hours, the water was decanted from the solid resin. The resin was extracted in this manner an additional three to four times. The residue from the water extraction at room temperature was dried and ground using a mortar and pestle. The ground resin was extracted with hot water in a Soxhlet apparatus for 24 hours. The room temperature extract and hot water extract were combined, concentrated, and diluted to a known volume for analysis. The quantity of modifier in the extract was determined by HPLC (77). 

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