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Marine-corrosion/hot-corrosion-resistant composite coating and preparation method thereof

A composite coating, hot corrosion technology, applied in the direction of coating, metal material coating process, fusion spray plating, etc., can solve the problems of hot corrosion, can not show obvious advantages, high material cost, and achieve excellent high temperature corrosion resistance , Good cathodic protection effect

Active Publication Date: 2011-10-05
ACADEMY OF ARMORED FORCES ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, some parts in the equipment are heated by thermal loads during operation, resulting in severe thermal corrosion.
For example, the smoke exhaust device of the engine of the amphibious armor equipment, and some steel parts of the power part of the ship equipment, bear the thermal load of 200-300 degrees Celsius or even higher temperature during work, resulting in severe thermal corrosion and corrosion of the marine environment. In the existing technology, it is difficult to solve the problem of thermal corrosion resistance of parts and harsh marine environment corrosion at the same time, such as the literature "Wang Huayu, Han Zhihai. Thermal corrosion resistance and bonding strength of several Ni-Cr thermal spray coatings. Xi'an Transportation University Journal, 2004 (2): 12-14 "introduced that Ni-Cr-based thermal spray coating has strong thermal corrosion resistance, but the cost of the material is extremely high, and due to the porous characteristics of the coating, it is not widely used in the ocean. Can't show clear advantage in the environment

Method used

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  • Marine-corrosion/hot-corrosion-resistant composite coating and preparation method thereof
  • Marine-corrosion/hot-corrosion-resistant composite coating and preparation method thereof
  • Marine-corrosion/hot-corrosion-resistant composite coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take 500g of aluminum powder, 500g of chromium powder and 25g of composite rare earth nickel powder and mix it evenly. Use 3245g of 08F high-quality low-carbon steel strip with a specification of 10mm×0.4mm (width×thickness), and pass through the multifunctional powder-cored wire forming test device. A sequence of rolling, powder filling, sealing, and wire drawing reduction is a sequence of processes to produce FeCrAlRE finished wire. The mass percentage of alloying elements in 08F low carbon steel strip is 0.05~0.11%C, 0.25~0.5%Mn, ≤0.03% Si, ≤0.035%P, ≤0.035%S, ≤0.25%Ni, ≤0.10%Cr, ≤0.25%Cu. The powder core filling rate of the wire is 24%, and the diameter of the wire is 2 mm.

[0042] Take 250g of aluminum-magnesium alloy powder with 50% by mass of magnesium, 250g of aluminum powder and 50g of composite rare-earth nickel powder and mix them uniformly, and use a Zn-Al alloy strip (containing 2.0% Al) with a specification of 10mm×0.5mm (width×thickness) 2500g, through the...

Embodiment 2

[0047] Take 790g aluminum powder, 200g chromium powder and a small amount of 10g composite rare earth nickel powder and mix them evenly, using 3000g 10F high-quality low-carbon steel strip with a specification of 10mm×0.3mm (width×thickness), and pass through the multifunctional powder core wire forming test device Strip rolling, powder filling, sealing, wire drawing and diameter reduction are a sequence of processes to obtain FeCrAlRE finished wire. The mass percentage of alloying elements in 10F low carbon steel strip is 0.07~0.14%C, 0.25~0.5%Mn, ≤0.07%Si, ≤0.035%P, ≤0.035%S, ≤0.25%Ni, ≤0.15%Cr, ≤ 0.25% Cu. The powder core filling rate of the wire is controlled to 25%, and the diameter of the wire is 2mm.

[0048] Take 80g of aluminum-magnesium alloy powder containing 50% by mass of magnesium, 760g of aluminum powder and 10g of composite rare-earth nickel powder, and mix them uniformly, and use a Zn-Al alloy strip (containing 0.5% Al) with a specification of 10mm×0.5mm (width×...

Embodiment 3

[0052] Take 500g of aluminum powder, 375g of chromium powder and 125g of composite rare earth nickel powder and mix uniformly. Use 08F high-quality low-carbon steel strip with a specification of 10mm×0.4mm (width×thickness), and pass through a multifunctional powder-cored wire forming test device. , Powder filling, sealing, wire drawing and reducing diameter are a sequence of processes to produce FeCrAlRE finished wire. The powder core filling rate of the wire is controlled to 20%, and the wire diameter is 2mm.

[0053] Take 600g of aluminum-magnesium alloy powder containing 50% by mass of magnesium, 200g of aluminum powder and 250g of composite rare-earth nickel powder and mix them uniformly, and use a Zn-Al alloy strip (containing 1% Al) with a specification of 10mm×0.5mm (width×thickness) 3950g, through the multifunctional powder core wire forming test device, through a sequence of rolling, charging, sealing, wire drawing and reducing diameter, the finished wire is obtained. Th...

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Abstract

The invention discloses a marine-corrosion / hot-corrosion-resistant composite coating and a preparation method thereof, belonging to the technical field of metal surface protection. A novel FeCrAlRe hot-corrosion-resistant powder core wire material is prepared by coating mixed powder, containing Cr powder, Al powder and the like, on a carbon steel band. A ZnAlMgRe powder core wire material is prepared by coating mixed powder, containing Al, Mg, Zn and Re, on a Zn-base alloy band. The preparation method of the composite coating comprises the following steps: spraying the FeCrAlRe powder core wire material by using a high-speed arc spraying device to form an alloy coating on a pretreated steel base surface, and spraying a ZnAlMgRe coating to form a double-layer composite structure protective coating. The prepared coating can resist hot corrosion, and has excellent corrosion resistance in a marine high-humidity high-salt-mist environment.

Description

Technical field [0001] The invention relates to a FeCrAlRE+ZnAlMgRE double-layer composite coating and a preparation method thereof, and is mainly suitable for corrosion protection of steel structure parts under severe conditions of thermal corrosion under the marine environment, and belongs to the technical field of metal anticorrosive materials. Background technique [0002] Corrosion of equipment steel structure in marine climate, especially in sea water, high temperature, high humidity, high salt spray, high sunshine and other harsh conditions, has become increasingly prominent, and damage caused by corrosion has occurred from time to time. The use of zinc-aluminum alloy anticorrosive coatings is one of the effective methods for steel structure corrosion protection, such as the literature "Dong Lixian, Wang Yong, Li Xuesheng. The corrosion resistance of arc sprayed aluminum and aluminum-zinc coatings in dynamic corrosive media. Research on petroleum Journal of the University,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/08C23C4/073C23C4/131
Inventor 魏世丞徐滨士陈永雄张伟梁义刘毅
Owner ACADEMY OF ARMORED FORCES ENG PLA
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