Preparation method of metallic coating applied to corrosive environment

A metal coating and corrosive environment technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of wear resistance and corrosion resistance performance reduction, economic loss, hidden safety hazards, etc., to achieve excellent wear reduction, huge The effect of developing potential

Active Publication Date: 2018-12-25
HOHAI UNIV CHANGZHOU
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The coating adopts spraying technology. Due to the unstable spraying speed, the coating is uneven, and the performance of wear resistance and corrosion resistance is reduced.
[0005] The existing laser solubility surface modification technology is used to prepare composite coatings. The amorphous powder adheres to the surface of the substrate and has a certain wear-resistant and corrosion-resistant effect. However, the coating is easy to fall off and break, which will not only cause a lot of economic losses. , will also bring more potential safety hazards; the existing cladding technology cannot make the amorphous powder and the metal base material have a better mutual solubility effect

Method used

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  • Preparation method of metallic coating applied to corrosive environment
  • Preparation method of metallic coating applied to corrosive environment
  • Preparation method of metallic coating applied to corrosive environment

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Embodiment 1

[0030] This embodiment provides a method for preparing a metal coating applied in a corrosive environment, which is characterized in that it includes the following steps:

[0031] (1) Fully mix the iron-based amorphous powder and a polyvinyl alcohol solution with a mass fraction of 4-5% to obtain a preset powder;

[0032] (2) Pretreating the surface of the 316L stainless steel plate, after the pretreatment, the preset powder is evenly coated on the 316L stainless steel plate, and dried;

[0033] (3) Cladding the preset powder on the metal substrate with a laser, so that the metal substrate and the preset powder achieve metallurgical bonding;

[0034] (4) Repeated coating of a layer of preset powder, cladding the second layer by laser to obtain an amorphous / metal composite coating, and carried out characterization.

[0035] Step (1), using commercially available iron-based amorphous powder (purity 99.9%, particle size 200-325 mesh) as the raw material, the atomic percentages o...

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Abstract

The invention discloses a preparation method of a metallic coating applied to a corrosive environment. The preparation method includes the steps of coating a metal base with preset powder and drying uniformly; melting to clad the preset powder on the metal base through laser to achieve metallurgical bonding between the metal base and preset powder; repeating to coat the metal base with one layer of preset powder, cladding a second layer through the laser to obtain an amorphous/metallic composite coating, and performing characterization. Stainless steel and a thin layer of amorphous powder aremolten mutually to obtain the multi-phase structural composite coating by high-density energy of the laser according to the laser cladding technology; the composite coating has anti-friction performance, wear resistance and corrosion resistance much excellent than those of iron-based amorphous coating and the stainless steel base.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of surface coatings, in particular to a preparation method of metal coatings applied in corrosive environments. Background technique [0002] Laser technology is a new science developed in the early 1960s. The emergence of laser technology has caused a huge change in modern optical technology, and its applications in communications, agriculture, modern industry, scientific research, national defense, medicine, etc. are rapidly develop. Laser cladding technology is a new surface modification technology that uses laser beams to melt and solidify cladding materials and substrates to form cladding layers. The energy density of the laser beam is high, the action time is short, the heat-affected zone is small, the cladding layer has high bonding strength, fine structure, and few microscopic defects. Amorphous metals or alloys have high strength, hardness and toughness, excellent magnetism,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C45/02
CPCC22C45/02C22C2200/02C23C24/106
Inventor 纪秀林罗婵媛赵立娟赵建华
Owner HOHAI UNIV CHANGZHOU
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