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Method for spraying coating and killing coating on surface of oil tank and for jointly preventing corrosion

A surface spraying and coating technology, used in devices for coating liquids on surfaces, paints containing biocides, coatings, etc. Excellent anti-corrosion performance, reducing the effect of microbial corrosion and corrosion under scale

Active Publication Date: 2012-10-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above-mentioned research and technical measures are relatively comprehensive and detailed, the proposed anti-corrosion technology is basically limited to the selection of corrosion inhibitors and cathodic protection measures for metals such as zinc and magnesium. The anti-corrosion effect and the selection and application of biocidal coatings in oil tank sediment water are rarely reported, and there is no report on the combined anti-corrosion technology of metal spraying and biocidal coatings

Method used

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  • Method for spraying coating and killing coating on surface of oil tank and for jointly preventing corrosion
  • Method for spraying coating and killing coating on surface of oil tank and for jointly preventing corrosion
  • Method for spraying coating and killing coating on surface of oil tank and for jointly preventing corrosion

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Embodiment Construction

[0033] The method of the present invention is used to carry out anti-corrosion treatment on the inner wall of the oil tank, and the cathodic protection metal coating formed by aluminum or aluminum and glass flakes is sprayed on the inner surface of the tank to form cathodic protection for the metal of the tank body; the metal anti-corrosion coating is coated with The biocidal and antibacterial coating composed of modified epoxy resin and biocide prevents microbial corrosion caused by the deposition of various bacteria in the bottom of the tank.

[0034] The specific method includes the following steps:

[0035] 1. Metal spraying process

[0036] (1) cleaning

[0037] Use water with temperature ≥ 70°C, pressure ≥ 12MPa and detergent to clean the oil in the tank.

[0038] (2) Corrosion repair pit

[0039] The existing corrosion pits on the tank wall and tank bottom, especially the larger ones, are repaired by surfacing welding and ground to a flat surface.

[0040] (3) Sandb...

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Abstract

The invention discloses a method for spraying a coating and a killing coating on the surface of an oil tank and for jointly preventing corrosion, wherein a metal corrosion prevention coating is sprayed on the metal surface of an oil tank base body at first; and next, the killing coating taking natural asphalt-improved epoxy resin as a base body, taking polyamide or isocyanate as a cross-linking agent, and taking quaternary ammonium or styrene-acrylic isothiazolinone as a killing agent, is coated on the surface of the sprayed metal coating. According to the method for spraying the coating and the killing coating on the surface of the oil tank and for jointly preventing the corrosion, due to the metal coating and the killing coating, double protections are formed for the inner wall of a tank body; and therefore, the corrosion of microorganism in a water accumulation area on the bottom of the oil tank is prevented; the even corrosion rate and the hole corrosion tendency are effectively decreased; the corrosion prevention performance in a sedimentation water area of the oil tank is excellent; and the service life of the oil tank is prolonged.

Description

technical field [0001] The invention belongs to the technical field of metal corrosion and protection, and relates to an anticorrosion method for metal oil tanks, in particular to a combined anticorrosion method of oil tank surface spraying and biocidal coating. Background technique [0002] In recent years, high-acid, high-sulfur, high-water-content crude oil has continuously entered my country, aggravating the corrosion in oil tanks, making domestic oil tanks safe and maintenance-free production cycle generally only 3 to 5 years. At present, there has been great development in the research of oil tank corrosion and protection technology. The corrosion status of oil tanks, the causes of corrosion and the influencing factors of oil tank corrosion, including the influence of microorganisms in the bottom sludge of oil tanks on corrosion, corrosion There have been some research results on the evaluation methods of the reliability of oil storage tanks under environmental conditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/36B05D7/14B05D7/24B05D1/04B05D3/00C09D163/00C09D195/00C09D5/14
Inventor 陈晔奚冬兴周永璋孙正毅柏中中陈晓刚顾伯勤
Owner CHINA PETROLEUM & CHEM CORP
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