Method of coating steel substrates to reduce carbonaceous deposi

Details Method of coating steel substrates to reduce carbonaceous deposi Method of coating steel substrates to reduce carbonaceous deposi

1981-02-24

1984-01-24

Childs, Sadie L.

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273762, 427380, 427435, B05D 302

Patent

active

044277210

ABSTRACT:
Carbonaceous deposition on the surface of steel cracker tubes in chemical plant for the thermal cracking of hydrocarbons is a serious problem. It is met, in the invention, by providing the surface with a refractory oxide coating by contacting the surface with a sol comprising an aqueous dispersion of substantially unaggregated primary particles, the sol being capable of conversion to a gel the bulk density of which being at least 40% of the theoretical density of the refractory oxide when measured at ambient temperature and the gel being convertible to the refractory material, converting the sol to the gel, and firing.

REFERENCES:
patent: 3133829 (1964-05-01), Cupery et al.
patent: 3761571 (1973-09-01), Woodhead
patent: 3767453 (1973-10-01), Hoekstra
patent: 3773549 (1973-11-01), Elbert et al.
patent: 3785998 (1974-01-01), Hoekstra
patent: 3920583 (1975-11-01), Pugh
patent: 3957692 (1976-05-01), Cairns et al.
patent: 4238534 (1980-12-01), Ichida et al.

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