Surface treating agent, enamel steel and parts coated with surface treating agent

Abstract

The invention discloses a surface treating agent used for enamel steel or parts. All solid parts in a water solution of the surface treating agent comprise, by mass, 15-55 parts of water-based polymer resin A; 32-58 parts of organic silane coupling agent B with at least one epoxy group functional group; 0.2-3 parts of polyols C containing at least three hydroxyl groups; 0.05-2 parts of molybdenum compound D calculated by element molybdenum; 0.1-0 part of phosphorus compound E calculated by element phosphorus; 0.1-1 part of zirconium compound calculated by element zirconium; and 0.5-8 parts of metal salt or organometallic compound G with the function of promoting the tightness, wherein the mass ratio of the organic silane coupling agent B to the water-based polymer resin A is 0.6-2.2. The enamel steel coated with the surface treating agent has excellent machinability and good resistance to various chemical mediums, and the surface adhenrence of porcelain glaze layer and steel substrate and the surface quality of final enamel products are improved effectively.

Description

technical field [0001] The invention designs a surface treatment agent, in particular to a surface treatment agent for enameling steel or parts. Background technique [0002] Enameled steel products refer to a composite material that combines the strength and formability of steel plates with the advantages of corrosion resistance, wear resistance and bright colors of inorganic vitreous enamel materials. Therefore, enamelled steel products are widely used in various fields such as light industry, home appliances, construction and industry. [0003] The conventional production process of enamelled steel products is mainly as follows: [0004] 1) Process and shape the steel for enamel, and obtain a suitable part shape by welding or riveting. [0005] 2) Degrease, wash and dry the enamelled steel or parts to remove the oil residue on the surface. [0006] 3) Apply an enamel layer to steel or parts for enamelling. The main components of the enamel layer include mineral raw mat...

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Problems solved by technology

However, this technology also does not involve the acid and alkali resistance and solvent resistance in the surface treatment process of enamelled steel or parts processing, and the design of lubrication, friction and wear resistance in the molding process.

This technology also does not involve the thinning of the enamel layer and the improvement of the surface defects of the enamel layer such as surface pinholes, black spots and fish eyes, and a large amount of expensive and difficult-to-disperse nano-scale oxide ceramics are used in this technology, making it Coating process costs increase

[0018] The current conventional production process of enamelled steel products needs to use anti-rust oil, lubricating oil, degreasing agent, acid solution and nickel-containing solution, which not only has a negative impact on the environment and production costs, but also has a complicated process. The thickness of the enamel layer of enamelled steel products reaches more than 150μm

However, the technical solutions disclosed in the above-mentioned patent documents either improve the thinning of the enamel coating and pollute the environment at the same time with enamel surface defects such as surface pinholes, black spots, and fish eyes, or do not involve the improvement and lack of processing technology, or exist Does not involve the thinning of enamel coatings and the improvement of enamel layer surface defects such as surface pinholes, black spots and fish eyes

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