Tocalo Co., Ltd.

Seiichiro Kawachi

Takaomi Tanabe

Kosaku Hiyama

The method for forming a coating of the present invention includes: a first step of applying a first solution containing a polysilazane to a surface of a metal substrate and heating the first solution to form a first coating on the surface of the metal substrate, and a second step of applying a second solution containing a polysilazane to a surface of the first coating and heating the second solution at a temperature lower than a heating temperature in the first step to form a second coating on the surface of the first coating, wherein a density of the first coating is less than 2.00 g/cm, and a density of the second coating is 2.00 g/cmor more.

Method for forming silica-based multilayer coating on substrate from polysilazane-containing compositions

A method for forming a coating, which includes: a first step of applying a first solution containing a polysilazane to a surface of a metal substrate, heating the first solution to make the first solution undergo conversion into silica and form a first coating having open defects, on the surface of the metal substrate, and a second step of applying a second solution containing a polysilazane to a surface of the first coatingto fill the open defects, and heating the second solution at a temperature lower than a heating temperature in the first step to make the second solution undergo conversion into silica and form a second coating on a surface of the first coating.

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Hyogo, Japan

Seiichiro Kawachi