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A kind of metal bellows surface treatment method

A metal bellows, surface treatment technology, applied in metal material coating process, vacuum evaporation plating, coating and other directions, can solve the problems of irregular turns, stain resistance, poor corrosion resistance, inconvenient pipeline and pipeline connection, etc. , to eliminate internal stress, increase corrosion resistance, good hydrophobicity and oleophobicity

Active Publication Date: 2020-11-27
ANHUI GAS BELLOWS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is mainly used for non-concentric axial transmission with small bending radius, or irregular turning, expansion and contraction, or absorbing thermal deformation of pipelines, etc., or it is not convenient to use fixed elbows to connect pipelines, or to connect pipelines with pipelines. Device connection and use
Traditional metal bellows have poor stain resistance and corrosion resistance, which needs to be improved urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for surface treatment of metal bellows, the steps comprising

[0026] Heat treatment: suspend the metal bellows in a closed steam box, pass ethanol steam in the steam box, the temperature of the ethanol steam is 180°C, and the metal bellows are placed for 2.5 hours;

[0027] Activation treatment: soak the metal bellows in the activator solution, the activator solution is sodium dodecylbenzenesulfonate, the soaking time is 1h, and the elongation and elongation of the metal bellows are constantly changed during the soaking process. The range of change is -5% to 5%, and the change rate is to change the length by 1% every 8s;

[0028] Coating treatment: PVD coating is formed on the inner and outer walls of the metal bellows by vacuum evaporation, the thickness of the PVD coating is 0.01mm, and the film material selected for PVD coating is NiO;

[0029] Etching treatment: conduct plasma etching by ion beam, once etch to form micro-mastoids or depressions on the sur...

Embodiment 2

[0031] A method for surface treatment of metal bellows, the steps comprising

[0032] Heat treatment: suspend the metal bellows in a closed steam box, pass ethanol vapor in the steam box, the temperature of the ethanol steam is 190°C, and the metal bellows are placed for 2.2 hours;

[0033] Activation treatment: soak the metal bellows in the activator solution, the activator solution is sodium lauryl sulfate, the time of the soaking process is 2.5h, the elongation of the metal bellows is constantly changed during the soaking process, the elongation of the elongation The change range is -5% to 5%, and the change rate is 1% of the length every 8s;

[0034] Coating treatment: PVD coating is formed on the inner wall and outer wall of the metal bellows by sputtering coating, the thickness of PVD coating is 0.012mm, and the film material selected for PVD coating is Ti;

[0035] Etching treatment: conduct plasma etching by ion beam, etch once to form micro-mastoids or depressions on...

Embodiment 3

[0037] A method for surface treatment of metal bellows, the steps comprising

[0038] Heat treatment: suspend the metal bellows in a closed steam box, pass ethanol vapor in the steam box, the temperature of the ethanol steam is 200°C, and the metal bellows are placed for 2 hours;

[0039] Activation treatment: soak the metal bellows in the activator solution, the activator solution is potassium lauryl sulfate, the soaking time is 4h, the elongation of the metal bellows is constantly changed during the soaking process, and the change of elongation The range is -5% to 5%, and the change rate is to change the length by 1% every 8s;

[0040] Coating treatment: PVD coating is formed on the inner wall and outer wall of the metal bellows by sputtering coating, the thickness of PVD coating is 0.015mm, and the film material selected for PVD coating is Sn;

[0041] Etching treatment: Plasma etching is carried out by atmospheric plasma, the surface of the PVD coating is etched once to f...

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PUM

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Abstract

The invention discloses a metal corrugated pipe surface treatment method. The metal corrugated pipe surface treatment method comprises the steps of heat treatment, activating treatment, film coating treatment and etching treatment. The metal corrugated pipe surface treatment method has the advantages that the inner stress is removed, and grease or other impurities on the surface of a metal corrugated pipe primary finished product can be effectively removed through the heat treatment of ethanol steam, and the inner surface and the outer surface of a corrugated pipe can be subjected to uniform and sufficient treatment through a sealed steam box; through soakage of an activating agent solution, the corrugated pipe is soaked and is elongated and compressed continuously, so that the activatingtreatment is more complete, the later film coating quality is improved, and the problems of elastic resilience of the corrugated pipe in the later period, and the difference of wave pitches and wave patterns can be effectively solved; through PVD film coating, the corrosion resistance of the corrugated pipe is improved, and the service life of the corrugated pipe is prolonged; and a micron-nano double micro-structure is etched, so that the surface of the corrugated pipe is good in stain resistance, and the accuracy of the corrugated pipe can be ensured in the long term when the corrugated pipeserves as a measuring sensitive element.

Description

technical field [0001] The invention relates to the technical field of bellows production, in particular to a surface treatment method for metal bellows. Background technique [0002] Metal bellows is a kind of pipe that looks like a regular wave. Commonly used metal bellows include carbon steel, stainless steel, steel-lined plastic, aluminum, etc. It is mainly used for non-concentric axial transmission with small bending radius, or irregular turning, expansion and contraction, or absorbing thermal deformation of pipelines, etc., or it is not convenient to use fixed elbows to connect pipelines, or to connect pipelines with pipelines. device connection. The traditional metal bellows are poor in stain resistance and corrosion resistance, which needs to be improved urgently. Contents of the invention [0003] The object of the present invention is to provide a method for surface treatment of metal bellows, which significantly improves the properties of the bellows such as s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/02C23C14/22C23C14/58
CPCC23C14/02C23C14/22C23C14/5833
Inventor 王建华王征
Owner ANHUI GAS BELLOWS