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Anticorrosion cladding method of complex joint of ocean platform

An offshore platform and complex technology, applied in the field of anti-corrosion coating of marine steel structures, can solve problems such as weld corrosion, pitting corrosion, marine environmental pollution disasters, etc., and achieve good airtightness, impact resistance, and anti-corrosion effect. Excellent, simple finish

Inactive Publication Date: 2013-08-28
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high toughness, high strength and low price of steel materials, these oil production platforms are currently made of steel materials, and the severe corrosion of steel will inevitably directly threaten the safety of these oil production platforms and cause serious economic losses. It is very urgent to study the corresponding protection of oil platforms
Due to the reason of welding, pitting corrosion and weld corrosion are very easy to occur at the complex nodes of the platform, which will cause additional stress concentration and fatigue cracks, which makes the complex nodes one of the areas most prone to corrosion on offshore platforms. Therefore, how to effectively The prevention of corrosion of complex nodes is also the focus of anti-corrosion work
At present, sacrificial anodes are generally used to protect the complex nodes of the platform, but the weight of the anodes used in the platform is more than a few hundred tons, which adds additional load to the platform and causes a lot of waste of resources; and the price of aluminum and zinc continues to rise. It also causes a waste of financial resources for the country and enterprises; a large amount of dissolved aluminum and zinc will pollute the sea area environment, causing huge pollution disasters to the marine environment of our country

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1. Anti-corrosion coating of offshore platform node steel structure

[0022] First, the surface of the steel structure of the offshore platform node is manually derusted. It is required that the surface treatment of the DH36 steel structure in the construction area must meet the ISO St2 standard, without obvious bubbling, floating rust and marine organisms; the surface protrusions should not have sharp angles, and no It is higher than 5mm, and the maximum is not higher than 10mm; then, evenly apply petrolatum anti-corrosion paste (which is composed of mineral oil, a mixture of tannic acid and sodium benzene sulfinate, liquid paraffin and calcium carbonate) on the surface of the treated steel structure. The ratio of parts by mass is 2:1:6:4, wherein the ratio of parts by mass of tannic acid to sodium benzenesulfinate is 1:1), and the amount of smooth surface is about 300g / m 2 ; Corrosion is particularly serious about 400g / m 2 ; Then the mineral oil anticorrosion...

Embodiment 2

[0024] Example 2. Anti-corrosion coating of steel structure of offshore platform nodes

[0025] First, sand blast the surface of the steel structure of the offshore platform node. It is required that the surface treatment of the DH36 steel structure in the construction area must meet the ISO St2 standard or above, without obvious bubbling, floating rust and marine organisms; the surface protrusions should not have sharp angles, not high 5mm, the maximum is not higher than 10mm; then, evenly apply petrolatum anti-corrosion paste (which is composed of mineral oil, a mixture of tannic acid and sodium benzene sulfinate, mobile paraffin and mineral mica on the surface of the treated steel structure according to the quality The ratio of parts is 9:2:8:8, wherein the ratio of tannic acid to sodium benzenesulfinate is 1:1), and the amount of smooth surface is about 300g / m 2 ; Corrosion is particularly serious about 500g / m 2 ; Then the mineral oil anticorrosion tape (that is to soak t...

Embodiment 3

[0027] Example 3: Anti-corrosion coating of offshore platform node steel structure

[0028] First, sand blast the surface of the steel structure of the offshore platform node. It is required that the surface treatment of the DH36 steel structure in the construction area must meet the ISO St2 standard or above, without obvious bubbling, floating rust and marine organisms; the surface protrusions should not have sharp angles, not high 5mm, maximum not higher than 10mm; then, evenly apply petrolatum anti-corrosion paste (which is composed of mineral oil, a mixture of tannic acid and sodium benzene sulfinate, liquid paraffin and calcium carbonate according to the quality) on the surface of the treated steel structure The ratio of parts is 5:1:7:6, wherein the ratio of tannic acid to sodium benzene sulfinate is 1:1), and the amount of smooth surface is about 300g / m 2 ; Corrosion is particularly serious about 450g / m 2; Then the mineral oil anticorrosion tape (that is to soak the pe...

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Abstract

The invention discloses an anticorrosion cladding method of a complex joint of an ocean platform, which comprises the following steps of: (1) carrying out manual rust removal / or blast sanding on a to-be-processed steel structure of the complex joint of the ocean platform; (2) coating corrosion inhibition repair cream on the surface of the steel structure which is subjected to the processing in the step (1); (3) sticking a mineral oil anti-corrosion band on the corrosion inhibition repair cream; and (4) coating unsaturated polyester resin on the mineral oil anti-corrosion band, sticking the glass wool cloth on the unsaturated polyester resin, coating the unsaturated polyester resin on the glass wool cloth, and rolling. The invention has the beneficial effects that the construction is convenient, the surface processing is simple, and the anticorrosion cladding method is suitable for an object with any shape and any structure; and by adopting the method, the complex joint of the ocean platform has good sealability, impact resistance and excellent anticorrosion effect, is environmental-friendly, and has no toxicity or pollution. The anticorrosion cladding method can be suitable for the cladding corrosion resistance of any complex joint of the ocean platform.

Description

technical field [0001] The invention relates to an anti-corrosion coating method for marine steel structures, in particular to an anti-corrosion coating method for complex nodes of an ocean platform. Background technique [0002] The ocean is a huge treasure house of resources. With the development of science and technology and the continuous increase of population, the resources on land are increasingly unable to meet the needs of economic development, and the development and utilization of marine resources account for an increasing proportion of the national economy. important. At present, it has been proven that China's offshore oil resources account for 1 / 4 of the country's total oil production. The total proven reserves of the Bohai Oilfield alone exceed 4.5 billion tons, and my country will invest more than 50 billion yuan in the Bohai Sea in the next five years. Build 50 oil production platforms and 1,100 production wells. Due to the high toughness, high strength and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F15/00
Inventor 王在峰
Owner CHINA NAT OFFSHORE OIL CORP
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