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Method for preparing composite coating on surface of metal product

A metal product and composite coating technology, applied in the direction of metal material coating process, coating, hot-dip coating process, etc., can solve the problems of poor erosion resistance, poor adhesion, easy to fall off, etc., to improve corrosion resistance, The effect of improved binding ability and strong anti-scouring ability

Inactive Publication Date: 2020-12-04
霸州市青朗环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, such alloy coatings mainly include Zn-Ni, Zn-Co, Zn-Fe, Zn-Ti, Zn-Sn, Zn-Al, etc. Among them, Zn-Al composite coatings have better corrosion resistance than other alloy coatings. However, although the method of composite electrodeposition or composite mechanical plating can make it form a composite coating on the surface of the metal workpiece, there are certain defects in the thickness and uniformity of the coating, which makes the Zn-Al alloy coating attached to the surface of the metal workpiece Poor focus, easy to fall off, poor erosion resistance, and thus reduce its service life

Method used

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  • Method for preparing composite coating on surface of metal product
  • Method for preparing composite coating on surface of metal product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing a composite coating on the surface of a metal product, the specific steps are as follows:

[0020] S 1 1. Soak the stainless steel sheet with a thickness of 4cm in water for 15min, then treat it in ultrasonic with a frequency of 100Hz for 10min, take it out, wash it with surfactant, rinse it with water, and finally dry it under vacuum for 3h. 50°C;

[0021] S 2 , preparing composite coating composition, described coating composition is made of the raw material of following weight part:

[0022] 41.2 parts of nano-aluminum powder with a particle size of 15nm, 29.6 parts of alumina powder with a particle size of 28 μm, 121 parts of nano-zinc powder with a particle size of 35 μm, 12 parts of zinc sulfide powder with a particle size of 16 μm, and nano 1.5 parts of iron powder;

[0023] S 3 , heating the composite coating composition under a nitrogen atmosphere to melt, while step S 1 Preheat the treated stainless steel sheet to 250°C, then immer...

Embodiment 2

[0027] A method for preparing a composite coating on the surface of a metal product, the specific steps are as follows:

[0028] S 1 1. Soak the stainless steel sheet with a thickness of 3cm in water for 15 minutes, then treat it in ultrasonic with a frequency of 50Hz for 5 minutes, take it out, clean it with surfactant, rinse it with water, and finally dry it under vacuum for 3 hours. 50°C;

[0029] S 2 , preparing composite coating composition, described coating composition is made of the raw material of following weight part:

[0030] 45 parts of nano-aluminum powder with a particle size of 10nm, 31 parts of alumina powder with a particle size of 3μm, 130 parts of nano-zinc powder with a particle size of 6μm, 18 parts of zinc sulfide powder with a particle size of 27μm, and nano-particles with a particle size of 30nm Iron powder 3 parts;

[0031] S 3 , heating the composite coating composition under a nitrogen atmosphere to melt, while step S 1 Preheat the treated sta...

Embodiment 3

[0035] A method for preparing a composite coating on the surface of a metal product, the specific steps are as follows:

[0036] S 1 1. Soak a stainless steel sheet with a thickness of 5cm in water for 20min, then treat it in an ultrasonic wave with a frequency of 150Hz for 5min, take it out, wash it with a surfactant, rinse it with water, and finally dry it under vacuum for 3h. 50°C;

[0037] S 2 , preparing composite coating composition, described coating composition is made of the raw material of following weight part:

[0038] 52 parts of nano aluminum powder with a particle size of 50nm, 20 parts of alumina powder with a particle size of 28 μm, 100 parts of nano zinc powder with a particle size of 40 μm, 10 parts of zinc sulfide powder with a particle size of 36 μm, and nano iron powder;

[0039] S 3 , heating the composite coating composition under a nitrogen atmosphere to melt, while step S 1 Preheat the treated stainless steel sheet to 200°C, then immerse the pre...

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Abstract

The invention discloses a method for preparing a composite coating on the surface of a metal product, which comprises following steps: performing pretreatment on the surface of the metal product, andperforming preheating; placing the preheated metal product in a composite coating composition for hot dipping after the composite coating composition is molten; and cooling the metal subjected to dipping to a room temperature in a reducing atmosphere, and finally carrying out high-temperature calcination to obtain the composite coating which is uniform in coating and high in binding capacity withthe metal product on the surface of the metal product. According to the method, the composite coating has higher corrosion resistance, and the binding capacity between the coating and a metal substrate is high so that the erosion resistance of the composite coating is further improved.

Description

technical field [0001] The invention relates to the technical field of metal coating processing, in particular to a method for preparing a composite coating on the surface of a metal product. Background technique [0002] Metal coating technology is a process of attaching a layer of metal film to the surface of metal or other materials to prevent metal oxidation (such as rust), improve wear resistance, conductivity, reflectiveness, corrosion resistance and enhance aesthetics. . [0003] With the continuous advancement of science and technology, the requirements for protective coatings are getting higher and higher. Traditional zinc coatings can no longer meet the requirements of high corrosion resistance and oxidation resistance. Studies have found that using zinc and a small amount of other metals as an alloy coating can further improve the corrosion resistance and high temperature resistance of the coating. At present, such alloy coatings mainly include Zn-Ni, Zn-Co, Zn-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/26
CPCC23C2/06C23C2/26
Inventor 杨紫惠
Owner 霸州市青朗环保科技有限公司