Surface lubricating treatment agent applied to galvanized steel sheet and treatment method of surface lubricating treatment agent

Abstract

The invention provides a surface lubricating treatment agent applied to a galvanized steel sheet and a treatment method thereof. The treatment agent comprises the following components: 0.1-10g / L of Mn < 2 + >, 0.2-20g / L of Ni < 2 + >, 0.1-30g / L of Na < + >, 1-110g / L of PO4 < 3->, 0.2-30g / L of MoO4 < 2->, 1-150g / L of NO3 <->, 10-600mg / L of a surfactant, 20-1000mg / L of a silane coupling agent, an acidity regulator and the balance of water. The total acidity of the treating agent is 10-60, the free acidity is 1-5, and the acid ratio is 5-40. The invention also provides a preparation method of the hot-dip galvanized sheet, which comprises the following steps: dip-coating a galvanized steel sheet strip steel in a solution tank filled with the surface treating agent for 30-80 seconds, and drying at the temperature of 70-140 DEG C. The invention also provides a preparation method of the hot-dip galvanized sheet, which comprises the following steps of: soaking the galvanized steel sheet strip steel in the solution tank filled with the surface treating agent for 30-80 seconds. According to the surface lubricating treatment agent applied to the galvanized steel sheet and the treatment method thereof, a layer of solid lubricating film can be formed on the surface of the galvanized steel sheet, the surface friction coefficient of the galvanized steel sheet is reduced, and the stamping forming quality is improved; die loss is reduced, and machining cost is reduced; the coating performance and the welding performance of the galvanized steel sheet are improved, and meanwhile the phosphating performance is not affected; corrosion resistance of the galvanized steel sheet is enhanced, and storage, transportation, processing and environmental protection costs are reduced.

Description

Technical field: [0001] The invention relates to a surface lubricant and a treatment method thereof, which are mainly applied to the surface treatment of galvanized steel sheets. Background technique: [0002] Galvanized sheet is a kind of metal material obtained by plating metal zinc on the surface of steel plate. Due to its excellent decoration and coating properties, corrosion resistance and forming properties, it can be used in the fields of automobile manufacturing, construction industry and home appliance manufacturing. In the application process of these fields, most of the galvanized sheets require some mechanical processing, such as roll forming, stamping, shearing and bending deformation of metal sheets. Due to the soft galvanized layer of galvanized steel sheet, poor formability, and high friction coefficient between the coating and the die, the coating is prone to powder drop, blackening and other problems during stamping and forming, and sometimes even lead to ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems that the zinc-coated steel sheet is prone to sticking to the mold and powder falling off the coating during the stamping process, which affects the service life of the mold, causes steel stamping cracking, and affects the surface quality of the stamping parts, and at the same time enhances the corrosion resistance of the galvanized steel sheet, coating performance, welding performance, reduce production and storage and transportation costs, the invention provides a surface lubrication treatment agent applied to galvanized steel sheets and its treatment method

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