Forming method of large-scale metal storage tank with high bonding strength inner wall anticorrosive layer

A technology of bonding strength and anti-corrosion layer, applied in the field of plastic product molding and processing, can solve the problems of insufficient bonding force between polyethylene and steel substrate, delamination of inner and outer layers, peeling, etc., so as to solve the problem of insufficient bonding strength and enhance chemical bonding. Strength, bond strength and yield improvement effect

Inactive Publication Date: 2013-09-25
无锡新开河储罐有限公司 +1
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method based on laser texturing and silane deposition to enhance the quality problems of polyethylene and steel substrates due to the lack of bonding force between polyethylene and steel substrates in the existing rotational molding process. Rotational molding method of anticorrosion layer on inner wall of large metal storage tank combined with steel matrix

Method used

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  • Forming method of large-scale metal storage tank with high bonding strength inner wall anticorrosive layer

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Embodiment 1

[0030] Such as figure 1 shown.

[0031] figure 1 The internal volume of the metal tank is 200 cubic meters, and its processing method is as follows:

[0032] First, prepare the silane solution for subsequent use, and the preparation method of the silane solution is as follows:

[0033] (1) Add methanol and deionized water to a magnetic stirrer to form a hydrolysis mixed solvent; the presence of methanol will prolong the hydrolysis time of KH 560 and make it more stable; the volume percentage of methanol and deionized water is: 25- 35%: 65-75%.

[0034] (2) Slowly add KH 560 silane to the mixed solvent for hydrolysis, dropwise add 30-40% by mass (optimally 35%) acetic acid solution to adjust the pH to 4.5 to 5.5, and the volume concentration of silane to be 4-6% (optimally 5%);

[0035] (3) Stir continuously until the solution is transparent and uniform;

[0036] (4) Place the solution at room temperature for hydrolysis, and after about 48 hours, the KH 560 solution req...

Embodiment 2

[0050] A method for forming a large metal storage tank with a high bonding strength inner wall anticorrosion layer, comprising the following steps:

[0051] 1. The step of roughening the surface of the steel substrate;

[0052] In this step, the 07MnCrMoVR stainless steel plate (with a size of 2900mm*1500mm*8mm) used for producing the outer wall of the storage tank is subjected to roughening treatment. The equipment used for laser texturing is the "Lance 3500" laser produced by Huagong Hengxin Laser Company. After the surface of the steel substrate is roughened by laser, a micro-concave-convex structure with a diameter of 200um, 20 points / mm2, and a roughness of 0.8-1.5um is formed, which increases the roughness of the surface of the steel substrate 1, and then aggregates The bonded contact area between the vinyl coating layer 4 and the steel substrate 1 increases, increasing the bonding strength.

[0053] 2. Use a cleaning agent to clean the surface of the steel substrate 1...

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Abstract

The invention discloses a forming method of a large-scale metal storage tank with a high bonding strength inner wall anticorrosive layer. The forming method is suitable for machining of large-scale polyethylene steel-plastic composite storage tanks. The forming method is characterized by including: (1) laser texturing of the surface, a micro concave-convex structure is machined on the surface of a steel plate through laser, and the bonding area of a steel substrate and a coating layer is improved; (2) silylanization, a KH560 silicane film bonding layer is formed on the surface of the steel substrate, and the KH560 silicane film bonding layer is bonded with a polyethylene coating layer through chemical bond. The forming method combining the laser texturing and the silylanization is adopted, the contact area is increased, meanwhile the chemical bond is led in, the bonding capacity of the steel substrate and the coating layer is improved, and quality of the storage tanks is guaranteed.

Description

technical field [0001] The invention belongs to plastic product molding processing technology, in particular to a rotational molding processing method, in particular to a method for enhancing the bonding strength between the plastic coating layer and the steel substrate in a rotational molding storage tank through the composite treatment of substrate laser texturing and silanization The forming method of large storage tanks with high bonding strength. Background technique [0002] With the improvement of the quality and performance requirements of large-scale anti-corrosion storage tanks in petroleum, pharmaceutical and other chemical industries, large-scale steel mesh plastic storage tanks using rotational molding are widely used due to their extremely high cost performance. In the current storage tank processing industry, rotational molding processing technology is widely used. Rotational molding is a thermoplastic hollow molding method, that is, first inject powdery or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D90/04
Inventor 周建忠朱炜立黄舒王江明陈亮冯爱新任旭东韩煜航吴天成
Owner 无锡新开河储罐有限公司
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