Inorganic coating for high temperature steel member label

Abstract

The invention provides a steel part high temperature labeled inorganic coating. A binder, white pigment and a dispersant according to the weight ratio of 100: (10 to 30):( 0.1 to 5) are mixed with water and are ball-milled into the coating which is white slurry has the average particle size less than 10 mu m, the solid content 20 to 60 weight percent, and the pH value 5 to 9. The white pigment of the coating can be one or more of titanium dioxide, zinc sulfide, lithopone, barium sulfate and talc; the dispersant of the coating can be one or two of sodium cellulose glycolate and sodium alginate; and the binder of the coating can be low temperature crown glass powder or the mixture of the low temperature crown glass powder and water glass, wherein the low temperature crown glass is prepared from raw materials which are less than 180 meshes, are intensively mixed and sintered for 1 to 3 hours at 600 DEG C and ground into less than or equal to 300 meshes; and the raw materials comprise the following components: 60 to 80 percents of P2O5, 1 to 10 percents of B2O5, 15 to 30 percents of ZnO, and 0 to 5 percents of Na2O.

Description

Technical field: [0001] The invention belongs to an inorganic high-temperature paint, in particular to a paint for marking high-temperature steel parts, which is suitable for making data marks on steel billets, steel ingots, steel coils and other steel parts. Background technique: [0002] High-temperature marking is a marking method sprayed on the surface or prominent position of steel parts such as billets, steel ingots, and coils, and is used to mark the melting furnace number, steel type, production batch, unit and other information of steel parts. Its purpose is to manage and track the quality of steel parts in the subsequent process to ensure that the steel has complete performance data, and it is also used to trace possible problems in the previous process. [0003] Since the surface of multiple process substrates of steel parts after coming out of the upstream process is at a relatively high temperature (100-1400 ° C), at this time, the use of paint for marking by sp...

AI Technical Summary

Problems solved by technology

[0004] CN1470570A discloses a kind of "high-temperature steel billet sign spray printing coating", although this coating can meet the requirements of forming clear and firm marks at high temperature, but due to the high acidity of the coating itself (pH value at normal temperature 1-2) the production equipment, The packaging container puts forward high corrosion resistance requirements, and special spraying equipment must be used in the application process, which is not conducive to the promotion and application of the coating

However, this method is also under acidic conditions, and is realized by surface chemical reaction with the steel substrate at high temperature. It also puts forward requirements on the corrosion resistance of the equipment during the preparation and application process. Although the application method is relatively simple, the used The fineness of the pigment is less than 1 micron, which greatly increases the cost of the coating during the production process, and is also not easily accepted by the market