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Anti-corrosion treatment method for bottom plate of COREX gas holder

A technology for anti-corrosion treatment and gas cabinets, which is applied in the direction of pretreatment of surfaces, coatings, and devices for coating liquids on surfaces. Effect

Inactive Publication Date: 2021-06-04
XINJIANG BAYI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for anti-corrosion treatment of the bottom plate of COREX gas cabinet, which can effectively solve the problem of gas condensate acid corrosion of the bottom plate of the gas cabinet and prolong the service life of the bottom plate of the gas cabinet

Method used

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Embodiment Construction

[0006] An anti-corrosion treatment method for the bottom plate of a COREX gas cabinet, which is implemented in accordance with the following steps: Step 1: use electric welding to fill the corrosion pits, use a grinder to clean up the sundries and oil stains at the corrosion points, wipe off the water, and weld each corrosion pit point; the second step: sandblasting and derusting: (1) Grinding off the oil stains, attachments, and oxide scales on the surface of the cabinet bottom plate, and polishing off the welding nodules, welding slag, and spatter on the surface welds; (2) Structural corners and surface unevenness are polished to smooth or smooth transitions; (3) Sandblasting and derusting, using the segmented sandblasting method, that is, sandblasting and derusting a certain area first, with a particle size of 1-3.2mm, of which The particle size of 1-1.5mm is not less than 40%, and the water content is less than 1%. The quality grade achieved by sandblasting is determined in...

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Abstract

The invention discloses an anti-corrosion treatment method for a bottom plate of a COREX gas holder. The anti-corrosion treatment method is implemented according to the following steps: 1, filling corrosion pits by using electric welding; 2, carrying out sand blasting to remove rust; 3, cleaning: cleaning the qualified surface with alcohol or acetone before coating first primer; 4, spraying a polyurea elastomer, namely starting to spray a polyurea elastomer anticorrosive material by adopting a polyurea elastomer spraying machine under the conditions that the pressure is 2,500 / 3,200 psi, the system temperature is 60-75 DEG C and the raw material temperature is kept above 20 DEG C after each system runs normally; constructing at the temperature 3 DEG C higher than the dew point temperature, conducting spraying operation by mixing the materials according to the volume ratio of 1: 1, performing temperature control during polyurea spraying construction, detecting the temperature of a raw material barrel firstly and keeping the temperature at 19 DEG C or above, not connecting a spray gun firstly, measuring the temperature of an output tail end of a heating hose, wherein the temperature ranges from 60 DEG C to 70 DEG C, and checking the thickness of a coating on a steel substrate through a thickness gauge, wherein the thickness is not less than 1.5 mm; and conducting an adhesive force test after each coating construction; and 5, conducting electric spark testing.

Description

technical field [0001] The invention relates to an anti-corrosion treatment method for the bottom plate of a COREX gas cabinet. Background technique [0002] Gas leaked from the bottom of the COREX gas cabinet of Ouyeel Furnace. After the gas cabinet was returned, it was found that the bottom plate of the cabinet was corroded due to the high content of chloride ions in the condensed water of the gas. Distributed over the entire cabinet floor. The thickness of the original base plate is 6mm, and the material is Q235B. To replace the cabinet board, the side board of the gas cabinet needs to be removed, and the steel plate needs to be purchased for replacement, which requires a lot of money and construction period. Moreover, the problem of corrosion and perforation cannot be solved after replacement. After 4-5 years of use, the corrosion and perforation will also leak gas, causing a major safety hazard. According to relevant information, there are no enterprises that continu...

Claims

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Application Information

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IPC IPC(8): B05D5/00B05D5/08B05D7/14B05D7/24B05D3/00B05D3/10
CPCB05D5/00B05D5/08B05D7/14B05D7/24B05D7/584B05D3/002B05D3/102B05D2202/10
Inventor 刘建民柴晓慧庹文明
Owner XINJIANG BAYI IRON & STEEL
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