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Preparation method of corrosion-resistant conductive grounding carbon steel in-situ coating

A carbon steel, in-situ technology, applied in the direction of contact manufacturing, connecting contact materials, etc., can solve the problems of uneven coating, poor adhesion of external coating, and continuous consumption of resources by cathodic protection technology. Reduce corrosion rate, avoid long-term consumption and maintenance effect

Pending Publication Date: 2021-08-20
ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned technologies have the following defects: cathodic protection technology has the disadvantage of continuous consumption of resources; external coatings have poor adhesion and uneven coatings, resulting in the phenomenon of small anodes and large cathodes, resulting in the risk of partial shedding

Method used

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  • Preparation method of corrosion-resistant conductive grounding carbon steel in-situ coating
  • Preparation method of corrosion-resistant conductive grounding carbon steel in-situ coating
  • Preparation method of corrosion-resistant conductive grounding carbon steel in-situ coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing an in-situ coating of corrosion-resistant grounded carbon steel, comprising the steps of:

[0026] (1) Surface pretreatment of carbon steel: Wipe the carbon steel with ethanol solution and sand it for 10 minutes under 100# silicon carbide sandpaper;

[0027] (2) The treated carbon steel is used as the anode, the graphite plate is used as the cathode, and the ratio of the surface area of ​​the carbon steel to the surface area of ​​the graphite plate is 1:20. Placed in the in-situ electrolyte, the temperature of the electrolyte is controlled at 40°C, the stirring speed is 300r / min, the setting parameters of the DC power supply are current 0.5A, frequency 50Hz, the power is turned on for in-situ treatment, and the treatment stops after 30 minutes

[0028] Electrolytic treatment for a certain period of time, the components and contents of the in-situ treatment solution are: 5g / L sodium metaaluminate, 5g / L sodium hexametaphosphate, 3g / L sodium carbonat...

Embodiment 2

[0032] The method of Example 1 was repeated according to the content of each component specified in Table 1 below, and the test results are listed in Table 1.

Embodiment 3

[0034] The method of Example 1 was repeated according to the content of each component specified in Table 1 below, and the test results are listed in Table 1.

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Abstract

The invention relates to a preparation method of a corrosion-resistant grounding carbon steel in-situ coating. The preparation method comprises the following steps of (1) pretreating the surface of carbon steel, (2) placing the treated carbon steel serving as an anode and a graphite plate serving as a cathode in an in-situ electrolyte, and carrying out electrolytic treatment for a certain time, and (3) putting the carbon steel treated in the step (2) into in-situ post-treatment liquid, and stopping post-treatment for a certain time. The method disclosed by the invention overcomes the defects that an external coating is poor in adhesive force and easy to fall off. Meanwhile, the problems of long-term consumption and maintenance of an electrochemical protection technology are avoided. On the basis of ensuring the conductive drainage of the carbon steel material, the corrosion form is controlled to be uniform corrosion, the corrosion rate of the carbon steel material in soil is greatly reduced, and finally, the grounding carbon steel meets the service cycle of design requirements.

Description

technical field [0001] The invention belongs to the field of material corrosion and protection, and relates to the anti-corrosion technology of conductive grounding carbon steel, in particular to a method for preparing an in-situ coating of corrosion-resistant conductive grounding carbon steel. Background technique [0002] Carbon steel is a common buried drainage material for grounding grids, but corrosion inevitably occurs during service. Therefore, it is necessary to carry out anti-corrosion technology protection. At present, the main protection technologies include hot-dip galvanizing, hot-dip copper, conductive coating and other cladding coating treatment technologies, and cathodic protection technology; the technical principles of the above methods can be divided into two categories: one It is the protective body (zinc, sacrificial anode, current source) that provides electrons to the protected body (carbon steel) to avoid the corrosion of the grounding material; the o...

Claims

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Application Information

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IPC IPC(8): H01R43/16H01R4/66
CPCH01R4/66H01R43/16
Inventor 赵鹏于金山于奔裴锋胡家元马光董久辉陈文福王鑫焱管森森甘智勇郑中原郝春艳苏展姜玲张佳成李谦
Owner ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO
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