Anti-corrosive coating for aluminum electrolytic cells and preparation method thereof

An anti-corrosion coating, aluminum electrolytic cell technology, applied in anti-corrosion coatings, coatings and other directions, can solve the problem of anti-corrosion coating adhesion, water resistance and poor acid and alkali resistance, tank shutdown overhaul, aluminum electrolytic cell protection can not function for a long time, etc. problem, to achieve the effect of excellent adhesion

Inactive Publication Date: 2015-04-22
NANTONG RUIDA ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sodium penetrates into the carbon material, causing the volume of the carbon material to expand and produce cracks, and aluminum and electrolytes invade the cathode along the cracks, eventually leading to shutdown and overhaul
[0007] In order to prolong the service life of the aluminum electrolytic cell, measures should be taken from various aspects, among which the improvement of the corrosion resistance inside the electrolytic cell itself is one of the aspects. Poor, as a protection inside the aluminum electrolytic cell, it cannot function for a long time

Method used

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  • Anti-corrosive coating for aluminum electrolytic cells and preparation method thereof
  • Anti-corrosive coating for aluminum electrolytic cells and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] An anticorrosion coating for an aluminum electrolytic cell, comprising: 10 parts of polycarbonate, 5 parts of phenolic resin, 2 parts of barium stearate, 0.2 part of silicone defoamer, 5 parts of ethyl 2-cyanoacrylate by weight components Parts, 3 parts of ethylene glycol dimethacrylate, 0.2 part of hexamethylenetetramine, 0.8 part of carboxymethyl cellulose, 8002 parts of polyethylene glycol, 5 parts of polyvinyl formal, polyboron silicone 1 part of oxane.

[0022] The preparation method of the anticorrosion coating for the aluminum electrolytic cell comprises the following steps:

[0023] Step 1, polycarbonate, phenolic resin, barium stearate, ethyl 2-cyanoacrylate, ethylene glycol dimethacrylate, carboxymethyl cellulose and polyethylene glycol 800 are mixed uniformly, specifically as follows: Stir at 150 rpm for 30 minutes to obtain mixture 1;

[0024] Step 2: Add mixture 1 to the reaction kettle, raise the temperature to 80°C under nitrogen protection, stir for 40...

Embodiment 2

[0027] An anticorrosion coating for an aluminum electrolytic cell, comprising by weight components: 13 parts of polycarbonate, 7 parts of phenolic resin, 3 parts of barium stearate, 0.4 part of silicone defoamer, 6 parts of ethyl 2-cyanoacrylate 5 parts of ethylene glycol dimethacrylate, 0.3 parts of hexamethylenetetramine, 1 part of carboxymethyl cellulose, 8003 parts of polyethylene glycol, 7 parts of polyvinyl formal, polyboron silicone 2 parts of oxane.

[0028] The preparation method of the anticorrosion coating for the aluminum electrolytic cell comprises the following steps:

[0029] Step 1, polycarbonate, phenolic resin, barium stearate, ethyl 2-cyanoacrylate, ethylene glycol dimethacrylate, carboxymethyl cellulose and polyethylene glycol 800 are mixed uniformly, specifically as follows: Stir at 150 rpm for 30 minutes to obtain mixture 1;

[0030] Step 2: Add mixture 1 to the reaction kettle, raise the temperature to 80°C under the protection of inert gas, stir for 4...

Embodiment 3

[0033] An anti-corrosion coating for an aluminum electrolytic cell, comprising by weight components: 15 parts of polycarbonate, 8 parts of phenolic resin, 4 parts of barium stearate, 0.5 part of silicone defoamer, 7 parts of ethyl 2-cyanoacrylate 6 parts, 6 parts of ethylene glycol dimethacrylate, 0.4 parts of hexamethylenetetramine, 1.3 parts of carboxymethyl cellulose, 8004 parts of polyethylene glycol, 8 parts of polyvinyl formal, polyboron silicone 3 parts of oxane.

[0034] The preparation method of the anticorrosion coating for the aluminum electrolytic cell comprises the following steps:

[0035] Step 1, polycarbonate, phenolic resin, barium stearate, ethyl 2-cyanoacrylate, ethylene glycol dimethacrylate, carboxymethyl cellulose and polyethylene glycol 800 are mixed uniformly, specifically as follows: Stir at 170 rpm for 40 minutes to obtain mixture 1;

[0036] Step 2: Add mixture 1 to the reaction kettle, raise the temperature to 85°C under the protection of inert ga...

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Abstract

The invention discloses an anti-corrosive coating for aluminum electrolytic cells and a preparation method thereof. The anti-corrosive coating comprises the following components: polycarbonate, phenolic resin, barium stearate, a defoaming agent, 2-ethyl cyanoacrylate, ethylene-glycol-dimethacrylate, hexamine, carboxymethylcellulose, polyethylene glycol, polyvinylformal acetal, and polybor-organosiloxane. The preparation method comprises the following steps: uniformly mixing polycarbonate, phenolic resin, barium stearate, 2-ethyl cyanoacrylate, ethylene-glycol-dimethacrylate, carboxymethylcellulose and polyethylene glycol, adding the obtained mixture into a reaction kettle, heating for reacting under the condition of inert gas protection, cooling to 40-50 DEG C, adding a defoaming agent, hexamine and polyvinyl formal acetal, continuing to stir so as to obtain a mixture 2; and adding polybor-organosiloxane in the mixture 2, heating for reacting under vacuum conditions, and cooling to room temperature, so that the anti-corrosive coating is obtained. The anti-corrosive coating provided by the invention is excellent in properties and suitable for use.

Description

technical field [0001] The invention belongs to the field of protective materials for electrolytic cells, and in particular relates to an anti-corrosion coating for aluminum electrolytic cells and a preparation method thereof. Background technique [0002] In the early stage of aluminum industry development, 4000-8000A small prebaked anode aluminum electrolytic cell was used, the current efficiency was about 70%, and the power consumption per kilogram of aluminum was 42kW·h. In the 1920s, Norway successfully developed a continuous self-baking anode with reference to the continuous self-baking electrode of the ferroalloy electric furnace at that time, forming a side-inserted rod self-baking anode aluminum electrolytic cell, the capacity of the aluminum electrolytic cell was expanded accordingly, and the current intensity reached 2.5 kA, the current efficiency is about 80%, and the power consumption per kilogram of aluminum is 20kW·h. This type of aluminum electrolytic cell w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/04C09D4/02C09D4/06C09D5/08
Inventor 薛瑄武赵玉玲
Owner NANTONG RUIDA ELECTRONICS MATERIAL
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