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Treatment process for preventing membrane corrosive pitting and perforating on surface of steel and iron base

A treatment process and surface film technology, applied in metal material coating process, anti-corrosion coating, coating, etc., can solve the problems of continuous and uniform film formation, discontinuous, uneven film, etc., to prevent electrochemical corrosion, Avoid potential difference, good uniformity effect

Inactive Publication Date: 2020-06-23
PINGDINGSHAN MEIYI METAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When performing a coating process to form a surface film such as an oxide film, the above-mentioned defects may not be able to form a continuous and uniform film layer, or the formed film may be discontinuous, uneven, or incomplete.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The spraying material is used to form a spraying layer on the surface of the pot through a spraying process, and then an oxide film is coated on the surface of the spraying layer. Use robots or manipulators to spray with frequency conversion to achieve uniform spraying, specifically using the spraying control system of the patent CN105182831B.

[0042] The spray material is Baosteel 1.2mm DC01 cold-rolled plate. The specific method of the spraying process is as follows: spray the molten spraying material heated to melt onto the surface of the iron-based material with compressed air, and the pressure condition of the compressed air is 0.6 MPa.

[0043] The thickness of the sprayed layer was 10 μm.

[0044] Before coating, the spray layer should be finely decorated, the specific method is: use 46-grit sandpaper to polish and finish.

[0045] The coating method refers to the patent CN104831332B, and the thickness of the oxide film is 15 μm.

[0046] Oil seal treatment is ...

Embodiment 2

[0048] The spraying material is used to form a spraying layer on the surface of the pot through a spraying process, and then a passivation film is coated on the surface of the spraying layer. Use robots or manipulators to spray with frequency conversion to achieve uniform spraying, specifically using the spraying control system of the patent CN105182831B.

[0049] The spray material is an iron-carbon alloy with a carbon content of 1%. The specific method of the melt-spraying process is: use compressed air to spray the molten spray material heated to the surface of the iron-based material, and the pressure condition of the compressed air is 1 MPa.

[0050] The thickness of the sprayed layer was 1500 μm.

[0051] Before coating, the spray layer should be finely decorated, the specific method is: use 240-grit sandpaper to polish and finish.

[0052] For the specific coating method, refer to the patent CN105331917B, and the thickness of the passivation film is 15 μm.

[0053] O...

Embodiment 3

[0055] The spraying material is used to form a spraying layer on the surface of the pot through a spraying process, and then a conversion film is coated on the surface of the spraying layer. Use robots or manipulators to spray with frequency conversion to achieve uniform spraying, specifically using the spraying control system of the patent CN105182831B.

[0056] The spray material is an iron-carbon alloy with a carbon content of 1%. The specific method of the melt-spraying process is as follows: spray the heated-to-melted melt-spray material onto the surface of the iron-based material with compressed air, and the pressure condition of the compressed air is 0.8 MPa.

[0057] The thickness of the sprayed layer was 500 μm.

[0058] Before coating, the spray layer should be finely decorated, the specific method is: use 240-grit sandpaper to polish and finish.

[0059] For the specific coating method, refer to the patent CN103924226B, and the thickness of the conversion film is ...

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Abstract

The invention provides a treatment process for preventing membrane corrosive pitting and perforating on the surface of a steel and iron base. The treatment process comprises the following steps that (1) an oxidation layer on the surface of a steel and iron base material is polished and removed; (2) a thermal spraying layer is formed on the surface of the steel and iron base material obtained in the first step through a thermal spraying technology; and (3) membrane laminating is conducted on the surface of the thermal spraying layer obtained in the second step. According to the treatment process, a compact particle surface layer can be formed on the surface of the steel and iron base by adoption of the thermal spraying layer, the homogeneity is good and no lattice defect exists; and potential equalization of the steel and iron base material covered with the surface membrane in a high-temperature state is achieved within the high-temperature range of 280-420 DEG C, the potential difference is avoided and the phenomenon of electrochemical corrosion causing breakdown of the surface membrane is prevented.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a treatment process for preventing pitting and perforation of steel-based surface films. Background technique [0002] Iron-based materials are widely used in hard surface materials, with good comprehensive performance, wide application fields and relatively low overall price, so they are highly respected in the industry. There are many types of iron-based materials, such as cast iron-based materials and steel-based materials, all of which have a very wide range of applications. [0003] In industrial production, in order to make iron-based materials have excellent properties such as corrosion resistance (salt, acid, atmospheric corrosion), wear resistance, high hardness, and low friction coefficient, the surface of the substrate is usually subjected to oxidation, passivation, various A treatment process such as a conversion coating, etc., forms a film on the surface o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/123C23C4/067C09D133/04C09D5/08C09D7/65
CPCC08L2205/035C09D5/08C09D143/04C23C4/067C23C4/123C09D7/65C08L33/04C08K13/06C08K9/06C08K9/04C08K3/38C08K5/521
Inventor 郭向阳
Owner PINGDINGSHAN MEIYI METAL PROD
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