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Corrosion-resistant break-resistant steel rail or steel wheel of train

A fracture-resistant and corrosion-resistant technology, applied in the direction of wheels, rails, and wheels featuring rail running parts, etc., can solve problems such as interference with railway signals, difficult cathodic protection of rails, hydrogen embrittlement fracture, etc., to reduce investment risks and production. Efficient and easy to implement effect

Inactive Publication Date: 2008-04-02
赵全玺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is feasible in principle, the humidity in the tunnel is a variable, and it cannot be guaranteed that a complete and continuous water film will be formed on the surface of the rails and sleepers at any time. Through the earth and sleepers to reach the surface of the rail, the large and variable voltage drop formed reduces the effect of cathodic polarization. In addition, this conventional cathodic protection method is susceptible to interference from underground stray currents (it will also interfere with railway signals, affect the normal transportation of railways), so it is difficult for this system to form effective cathodic protection for rails
In addition, the patent utilizes SO 2 , CO 2 It is inappropriate to achieve cathodic protection with the conductivity of acidic corrosive media such as nitrogen oxides, because hydrogen is evolved during the electrochemical reaction in acidic media, and there is a risk of hydrogen embrittlement fractures
[0022] The Chinese invention patent with application number 03137936.2 and application number 200410033844.2 proposes to use electronegative metal film or anode layer to coat steel parts (or metal parts) to be protected, forming a non-porous shielding and cathodic protection combined anti-corrosion system, Therefore, the two patents 03137936.2 and 200410033844.2 are used to protect the rail to ensure that the rail waist and rail bottom do not corrode, but due to the mutual friction between the rail head and the train steel wheel tread surface and the rail wheel, any cladding layer cannot be used, so 03137936.2 And the method provided by the 200410033844.2 patent cannot completely and effectively eliminate the severe damage and fracture failure caused by stress corrosion and corrosion fatigue of the rail head and steel wheel under the heavy load, and other existing anti-corrosion technologies cannot eliminate the serious damage and fracture failure caused by stress corrosion and corrosion fatigue. Severe damage to rail wheels due to stress corrosion and corrosion fatigue

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0057] Use aluminum alloy containing 3% Zn, 0.025% In, 0.1% Si, 0.3% Zr, and the balance is Al to make a thin plate with a thickness of 0.2 ~ 0.3mm in an annealed state, and go through matting treatment and coat the inner surface with a layer in advance A linear epoxy resin with a huge molecular weight, and the aluminum alloy sheet treated in this way is used as a sacrificial anode plate for standby. Attach the inner surface of the above-mentioned anode plate to the rail waist and rail bottom of the rail (see Figure 1), and use high frequency or intermediate frequency or other surface (instantaneous) heating methods to make the anode plate firmly adhere to the rail under pressure surface. During the railway transportation, use the existing oil coating device to recoat the alkaline corrosion inhibition layer, and apply it every 1 to 4 days. The formula of the alkaline corrosion inhibition layer is as follows:

[0058] Recipe 1 Recipe 2

[0059] Low molecular weight polyamide ...

Embodiment 2

[0066] The scope of bonding the anode plate, except the surface of the rail waist and the rail bottom according to the first embodiment, also includes the outer side of the rail head, and the others are exactly the same as the first embodiment, see Figure 2.

Embodiment 3

[0068] A zinc alloy containing 0.1-0.5% Al, 0.025-0.15% Cd, and the rest Zn is used as a sacrificial anode, and the anode is fixed on both sides of the rail through mechanical connection. Others are the same as in Embodiment 1, see FIG. 3 .

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Abstract

The invention relates to a corrosion- and fracture-resistant rail or train rail, which aims to eliminate various failures caused by corrosion, the crack or fracture phenomenon of wear resistant rail-wheel (or ordinary rail-wheel) caused by stress corrosion or corrosion fatigue and the contradiction between wear resistance and crack resistance of rail (or wheel). Concretely, an anode is directly arranged on the non-working face of a rail or a wheel; moreover, the surface of the rail or the wheel is coated with a corrosion inhibition layer with ionic conduction and corrosion inhibition functions. Through sacrificing anode or external connection with a controllable DC source, the invention realizes the novel electrochemical protection which combines cathodic protection with corrosion inhibitor; therefore, the service life of the rail, the wheel and rail fittings are prolonged times to meet the pressing requirements of speed increase and increasing heavy load of railway transportation.

Description

technical field [0001] The invention relates to a corrosion-resistant and fracture-resistant rail or train steel wheel, which belongs to a new type of long-life rail or wheel. Specifically, an anode is coated, bonded or placed on the non-working surface of the rail or wheel, and The surface of the rail or wheel is coated with an alkaline corrosion-inhibiting layer (instead of oil coating) with ionic conductivity and corrosion-inhibiting functions, so as to realize a new type of electrochemical protection combining cathodic protection and corrosion inhibitor, and eliminate stress corrosion or corrosion fatigue caused by corrosion resistance. Grinding the cracks or fractures of rail wheels (or ordinary rail wheels), and eliminating various faults caused by corrosion, greatly prolonging the service life of rail wheels and their accessories. The invention breaks the barrier of lack of communication between the two different technical fields of electrochemical anti-corrosion and ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/00E01B5/02B60B17/00
Inventor 赵全玺赵鸿赵毅李红梅
Owner 赵全玺
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