Corrosion Resistant Gas Coatings In Metallurgical Industry

       

What are the functions of
corrosion-resistant gas coatings? The corrosion-resistant gas coating must
protect the base material exposed to high-temperature corrosive gas. Due to the
simultaneous existence of oxidation and chemical reaction, it is necessary to
prevent the products of the reaction between the coating and gas from damaging
the base material.

What are the requirements for corrosion
resistant gas coatings? Corrosion resistant gas can withstand high temperature
corrosive gas; It can withstand periodic heat shock and overheating; Match with
the thermal expansion coefficient of the matrix. The recommended spraying
materials are nickel chromium alloy (except sulfur-containing medium), aluminum
spraying, sealing and hot infiltration. The recommended spraying methods are
plasma spraying and combustion flame spraying.

Application examples include the inner
surface of rotary kiln, brazing fixture, carbonization box, exhaust fan blade,
cyanidation crucible, gas flue system, boiler return pipe of power plant, coke
oven pipe, converter boiler, etc.

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