Thickened hot-dipping aluminum-zinc-plated steel plate and preparation method thereof

A hot-dip aluminum and steel plate technology, which is applied in the direction of chemical instruments and methods, layered products, metal layered products, etc., can solve the problems of lack of inspiration, lack of coating thickness, etc., and achieve excellent adhesion effect and process requirements Not harsh, effect of improving corrosion resistance

Inactive Publication Date: 2014-03-12
江苏克罗德科技有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] In the disclosed Chinese patent literature, the technical information of all galvanized steel sheets and their preparation methods can be seen, as the invention patent application publication number CN101736195A recommends "hot-dip galvalume steel sheets and production methods thereof", because the patent application scheme is for In terms of improving the physical strength of the substrate, so that it is suitable for color picture tube explosion-proof belts, it does not have a enlightening effect on solving the aforementioned technical problems; and for example, the publication number CN1542158A provides "hot-dip aluminum-zinc alloy steel plate and its manufacturing method" , although the patent application scheme discloses the chemical elements and their weight percentages that make up the coating: aluminum 53-57%, zinc 41.2-45.6% and silicon 1.4-1.8%, but it also has no technical significance for the rational planning of coating thickness

Method used

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  • Thickened hot-dipping aluminum-zinc-plated steel plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepared by figure 1 The steps of the thick hot-dip galvanized steel sheet of the structure shown are as follows:

[0027] A) Steel plate cleaning, select a 1.2mm thick cold-rolled steel plate with no scabs, pits and / or microcracks and other defects, and clean the two sides of the cold-rolled steel plate first, and then perform alkali Washing and electrolytic cleaning to remove surface oxide scale and / or oil stains, after cleaning, it is introduced into a drying tunnel for drying to obtain a substrate 1;

[0028] B) Coating the assisting layer, using the roller coating method to coat the first assisting layer 2 on the surface of the substrate 1 facing outward in the use state, and using the roller coating method to use the substrate 1 In the state, the surface of the inward-facing side is coated with the second assisted plating layer 3 to obtain the assisted plating steel sheet. The thickness of the first and second assisted plating layers 2 and 3 mentioned in this step are...

Embodiment 2

[0031] Change the thickness of the cold-rolled steel sheet in step A) to 5mm, and the cleaning is changed to first brush cleaning on both sides of the cold-rolled steel sheet, then pickling and electrolytic cleaning; change the first assist coating in step B) 2 and the thickness of the second plating assist layer 3 are changed to 2μm, and the weight parts of the raw materials constituting the plating assist layer are changed to: 50 parts of zinc chloride, 0.1 part of sodium fluoride, 10 parts of sodium chloride, 1 part of tin chloride, composite 1 part of surfactant and 37.9 parts of water, of which: the composite surfactant is N-hydroxyethyl perfluorooctyl sulfonamide; the thickness of the first structural layer in step C) is changed to 60 μm, and the thickness of the second structural layer is changed Change the chemical elements and their mass percentages in the aluminum-zinc-silicon rare earth alloy to: 60% aluminum, 2% silicon, 0.5% mixed rare earth, and 37.5% zinc. Among t...

Embodiment 3

[0033] Change the thickness of the cold-rolled steel sheet in step A) to 0.5 mm, and the cleaning is changed to alkaline washing and then pickling on both sides of the cold-rolled steel sheet; change the first auxiliary layer 2 and The thickness of the second plating assistance layer 3 is changed to 55nm, and the weight parts of the raw materials constituting the first and second plating assistance layers 2 and 3 are changed to: 15 parts of zinc chloride, 2 parts of sodium fluoride, 1 part of sodium chloride, and chlorine 0.5 parts of tin oxide, 3 parts of composite surfactant, 78.5 parts of water, among which: the composite surfactant is a mixture of 1.5 parts of alkylphenol polyoxyethylene ether and 1.5 parts of perfluorooctylsulfonyl quaternary iodide; Step C ) The thickness of the first structural layer 4 is changed to 25μm, the thickness of the second structural layer 5 is changed to 20μm, and the chemical elements and their mass percentages in the Al-Zn-Si rare earth alloy...

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Abstract

The invention discloses a thickened hot-dipping aluminum-zinc-plated steel plate and a preparation method of the thickened hot-dipping aluminum-zinc-plated steel plate and belongs to the technical field of coating steel plates. The thickened hot-dipping aluminum-zinc-plated steel plate comprises a substrate, wherein the surface of the outward side of the substrate in a used state is combined with a first plating-assistant layer, and the surface of the inward side of the substrate in the used state is combined with a second plating-assistant layer; the surface of the first plating-assistant layer is combined with a first structure layer; the surface of the second plating-assistant layer is combined with a second structure layer. Therefore, the thickness of a plated layer on the outward side of the substrate in the used state and the thickness of a plated layer on the inward side of the substrate in the used state are increased, and the sum of the thicknesses of the plated layers on the two sides is up to 270g/m<2>, so that the stability of the plated layers can be guaranteed, the good attachment effect between the plated layers and the substrate is achieved, the corrosion resistance performance, the processed shaping performance and the blackening resistance performance can be obviously improved, and the defects of falling off, cracking and the like of the plated layers during use can be avoided; the technical steps are simple and short; the technical requirement is low; the conventional aluminum-zinc-plated steel plate production line can be used for continuous and high-efficiency production.

Description

Technical field [0001] The invention belongs to the technical field of coated steel sheets, and specifically relates to a thickened hot-dip galvanized steel sheet, and also relates to a preparation method thereof. Background technique [0002] Since the concept of thickening in the thickened hot-dip galvanized steel sheet mentioned above refers to the thickening of the coating, the aforementioned thick hot-dip galvanized steel sheet can be called a thickened hot-dip coating with thickened coating. Aluminum zinc steel sheet. It is well known that the rapid development of the processing industry puts forward higher and higher requirements for metal corrosion protection. In metal corrosion, steel corrosion is the main one, and the marine environment, humid environment and atmospheric pollution environment in industrial-intensive areas cause steel corrosion. Key factor. The annual corrosion rate of existing steel and metal equipment in the world is about 10%, and the economic loss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/04B32B15/00B32B33/00
Inventor 姚天宇王海英李丽陶朕
Owner 江苏克罗德科技有限公司
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