THERMOSTATIC COATING ON TITANIUM AND ITS ALLOYS Russian patent published in 2021 - IPC C01B33/20 C01B33/24 C09D1/00 C09D5/26 C09D5/33 B64G1/58 

FIELD: space industry.

SUBSTANCE: invention relates to thermostatic coatings with protective properties applied to the outer surface of spacecraft to maintain a given thermal regime in them, as well as to protect against the damaging effects of space factors. The proposed thermostatic coating of the “solar reflectors” class on titanium and its alloys contains pseudovollastonite of monoclinic modification as an inorganic pigment, obtained by heat treatment of calcium silicate at a temperature of 1200-1250°C for 4.0-5.0 h, and lead silicate PbSiO₃ as a silicate binder. To obtain the proposed coating, a powdered mixture of pseudovollastonite of monoclinic modification and lead silicate in a molar ratio of 1:2 is applied to a substrate made of titanium or its alloy with a two-level porous layer on the surface formed by laser fusing of titanium carbide powder TiC and subsequent selective etching of the surfacing with boiling nitric acid for 30-40 minutes. The substrate with the applied composition is heated to a temperature of 780-820°C and kept at the reached temperature for 50-70 minutes.

EFFECT: ensuring high protective and strength properties of the thermostatic coating on titanium and its alloys, while maintaining these properties throughout its active service life due to increasing the adhesive traction of the coating to the titanium substrate, as well as reducing the waiting time for the applied coating to be ready for operation.

2 cl, 3 dwg, 3 ex