Protective coating for metal surfaces
AssigneeTechnip France
InventorsIzaak Jacobus Risseeuw, Franciscus Arnoldus Maria Jeunink
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Abstract
A method for heating or cooling a carbon containing reducing gas having a carbon monoxide content of at least 0.5 vol %, wherein the gas is heated to a temperature of at least 400° C. or wherein the gas is cooled from a temperature exceeding 400° C., wherein the gas is passed along a surface of a heating or cooling unit having a heat conductive metal or metal alloy body and a protective layer, which protective layer provides said surface, and which protective layer is made from a coating composition including colloidal amorphous silicate and crystalline oxide particles.
Claims28
A method for heating or cooling a carbon containing reducing gas having a carbon monoxide content of at least 0.5 vol %, wherein the gas is heated to a temperature of at least 400° C., the method comprising:
- heating the gas by passing the gas along a surface of a heating or cooling unit comprising a heat conductive metal or metal alloy body and a protective layer that reduces corrosion caused by carburization or metal dusting,
- wherein the protective layer provides said surface, and is made from a coating composition comprising:
- colloidal amorphous silicate comprising colloidal silica and amorphous silicate;
- crystalline oxide particles;
- optionally an emissivity agent;
- and
- optionally a stabiliser/binding agent.
Dependencies are inferred from the claim text.