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Composite coating of metal base material and construction method of composite coating

A metal substrate and composite coating technology, applied in metal material coating process, coating, superimposed layer plating and other directions, to achieve the effect of improving anti-corrosion performance, anti-coking performance and convenient material selection

Pending Publication Date: 2021-01-05
柯润森
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a single protection scheme cannot effectively solve the above problems

Method used

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  • Composite coating of metal base material and construction method of composite coating
  • Composite coating of metal base material and construction method of composite coating
  • Composite coating of metal base material and construction method of composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] (1) Select the corroded area of ​​the boiler water wall, sandblast the substrate to make the surface of the substrate reach Sa3.0 level, and blow off the dust particles on the surface of the substrate with compressed air;

[0087] (2) Spray the metal wire with an electric arc spraying machine. The metal wire is composed of metal elements in the following weight percentages: 45% chromium, 4% titanium, and 50% nickel. The diameter of the metal wire is 1.2 mm. Adjust the voltage of the arc spraying machine It is 32V, the spraying current is 160A, the spraying distance is 25cm, and the compressed air flow rate for spraying is 5m 3 / min, the air supply pressure is 0.6Mpa, and the thickness of the sprayed bottom layer is 50μm;

[0088] (3) Spray the surface layer after the bottom layer is cooled to room temperature, weigh the following raw materials and stir evenly, water glass 40%, alumina ceramic powder 20%, cerium oxide 5%, mica 10%, kaolin 5%, silane 1% joint additive, ...

Embodiment 2

[0090] (1) Select the corroded area of ​​the boiler water wall, sandblast the substrate to make the surface of the substrate reach Sa2.5 level, and blow off the dust particles on the surface of the substrate with compressed air;

[0091] (2) Use an arc spraying machine to spray the metal elemental wire. The metal wire is composed of the following metal elements by weight: 45% chromium, 4% titanium, and 50% nickel. The diameter of the metal wire is 3.0㎜. Adjust the arc spraying machine The voltage is 36V, the spraying current is 190A, the spraying distance is 30cm, and the compressed air flow rate for spraying is 5m 3 / min, the air supply pressure is 0.7Mpa, and the thickness of the sprayed bottom layer is 200μm;

[0092] (3) Spray the surface layer after the bottom layer is cooled to room temperature, take the following raw materials by weight and stir evenly, water glass 40%, alumina ceramic powder 25%, zirconia 10%, cerium oxide 5%, silane coupling agent 1% agent, 3% pure a...

Embodiment 3

[0094] (1) Select the corroded area of ​​the boiler water wall, sandblast the substrate to make the surface of the substrate reach Sa3.0 level, and blow off the dust particles on the surface of the substrate with compressed air;

[0095] (2) Spray metal elemental wire with a flame spray gun, and the metal wire is composed of the following metal elements in weight percent: 4% titanium, 25% chromium, 5% aluminum, 2% molybdenum, 1% rare earth, 1% vanadium, nickel 10%, iron 52%, the diameter of the metal wire is 6mm, the oxygen flow rate is adjusted to 100L / min, the acetylene flow rate is 100L / min, the spraying distance is 40cm, and the thickness of the spraying bottom layer is 500μm;

[0096] (3) Spray the surface layer after the bottom layer is cooled to room temperature, weigh the following raw materials and stir evenly, phosphate binder 40%, corundum ceramic powder 20%, aluminum powder 8%, cerium oxide 5%, silane coupling Additive agent 1%, silicon nitride 8%, chrome green 12%...

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Abstract

The invention discloses a composite coating of a metal base material. The composite coating is formed by compounding a bottom layer and a surface layer which sequentially coat the metal base material;the bottom layer is formed by wrapping a metal wire, metal powder and a metal skin wrapped wire; the surface layer is composed of ceramic powder and a binder; and the binder serves as a silicate binder, a phosphate binder or a sol binder. According to the composite coating of the metal base material and a construction method of the composite coating, the corrosion resistance and wear resistance of the metal coating and the compact lubrication characteristic of the ceramic coating are combined, so that the effect of 1+1 greater than 2 is achieved, the metal coating and the metal base materialare easier to combine, the bonding strength is greater than 60Mpa, the defect point pores or surface non-smoothness is made up by the ceramic coating, the obtained coating is high-temperature-resistant, corrosion-resistant, wear-resistant, high in lubrication and long in service life by the whole composite technology, and the temperature resistance of the composite coating is greater than 1600 DEGC.

Description

technical field [0001] The invention belongs to the technical field of composite coatings, and more specifically relates to a composite coating of a metal substrate and a construction method thereof. Background technique [0002] In the basic construction of many fields such as industry, agriculture, navigation, aerospace, military, etc., ordinary metal materials are often used as the primary material because of their low price. In actual use, ordinary metal materials such as carbon steel, 20G boiler steel, Q235, #45 steel, etc., cannot fully meet the applications of various industries. These materials are prone to wear, severe corrosion, high temperature oxidation, or because they are heat transfer Substrates in equipment have serious surface bonding due to fuel complex issues, etc. [0003] At present, there are many ways to solve the above problems, such as spraying protective coatings, such as metal thermal spraying corrosion-resistant and wear-resistant materials, clad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C4/06C23C24/04
CPCC23C28/30C23C28/34C23C4/06C23C24/04
Inventor 柯润森
Owner 柯润森
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