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Anti-corrosion treatment process for ship lock inverted-V-shaped door metal structure

A metal structure and anti-corrosion treatment technology, applied in the direction of pre-treatment surface, coating, special surface, etc., can solve the problems of reducing the safety and life of use, the metal structure is easy to be corroded, and endangering the safety of the ship lock operation, etc., so as to inhibit surface corrosion , excellent anti-corrosion performance, and low environmental impact

Inactive Publication Date: 2021-12-21
THREE GORNAVIGATION AUTHORITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The service life of the metal structure of the miter gate of a large ship lock is often required to be more than 50 years, and its use environment is harsh, many of which are underwater, and some are in a dry and wet environment, and the metal structure is easily corroded in these environments
Severe corrosion of the metal structure of the lock miter gate will greatly reduce the safety and life of use, and also endanger the operation safety of the lock

Method used

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  • Anti-corrosion treatment process for ship lock inverted-V-shaped door metal structure
  • Anti-corrosion treatment process for ship lock inverted-V-shaped door metal structure
  • Anti-corrosion treatment process for ship lock inverted-V-shaped door metal structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The coupon test is carried out by using the combined scheme of applied current cathodic protection of moisture-cured coatings, in which the moisture-cured coating is a two-component high-solid polyamine adduct cured epoxy paint. In this example, PPG of Pompej Coatings (Kunshan) Co., Ltd. is selected. Wear-resistant epoxy paint 880. The moisture-curing paint is first coated on the test piece, and the thickness gauge is measured to meet the requirements of the scheme. The test piece is hung on the auxiliary navigation wall upstream of Gezhouba No. 2 ship lock, on the side of the sand flushing sluice, and the potential data is measured with a portable copper sulfate reference electrode.

[0032] PPG paint St2: The paint surface is normal, without bubbling or chapping damage, and there are white fine sand particles attached to the scribed position. After cleaning, the silver metal substrate can be seen, and no rust is found on the exposed position, such as figure 1 Left ha...

Embodiment 2

[0037] Comprehensive anti-corrosion test of ship lock metal structure

[0038] The anti-corrosion coating of the upstream gate of a certain ship lock is poor. A prototype test was carried out on the upstream gate of the ship lock. On the basis of the original coating, impressed current cathodic protection was added, and the research work of coating-impressed current cathodic protection test was carried out.

[0039] During the specific construction, the steps are:

[0040] S1. Carry out surface pretreatment on the metal structure of the miter door, and clean up attachments, rust and other impurities; during surface pretreatment, wet sandblasting or high-pressure water is used for surface pretreatment, and the water produced is equipped with water retaining facilities and filtering facilities On-site recovery filtration and secondary use.

[0041] S2. Paint anti-corrosion Spray moisture-curing paint on the metal structure of the miter door, and the spraying amount is 0.45L / m p...

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Abstract

The invention provides an anti-corrosion treatment process for a ship lock inverted-V-shaped door metal structure. The anti-corrosion treatment process comprises the following steps that S1, surface pretreatment is conducted on the inverted-V-shaped door metal structure, and attachments, rust and other impurities are removed; S2, coating corrosion prevention is conducted, specifically, a moisture-curing coating is sprayed on the inverted-V-shaped door metal structure, and the spraying thickness is 0.4-1mm; and S3, a direct-current power source and an auxiliary anode are additionally arranged, the auxiliary anode is connected with the positive electrode of the direct-current power source to serve as an anode, the ship lock inverted-V-shaped door metal structure is connected with the negative electrode of the direct-current power source to serve as a cathode, protective current is provided by the direct-current power source, and an impressed current cathodic protection system is formed. Through the operation, anti-corrosion treatment of the ship lock inverted-V-shaped door metal structure is completed. According to the anti-corrosion treatment process, the comprehensive anti-corrosion technology combining the coating and impressed current cathodic protection is adopted, effective corrosion prevention of the large ship lock inverted-V-shaped door metal structure can be achieved, and the service life of the inverted-V-shaped door metal structure is prolonged.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion of large ship locks, and in particular relates to an anti-corrosion treatment process for a metal structure of a miter gate of a ship lock. Background technique [0002] The service life of the metal structure of large ship lock miter gates is often required to be more than 50 years, and its use environment is harsh, many of which are underwater, and some are in an environment of alternating dry and wet, and the metal structure is susceptible to corrosion in these environments. Severe corrosion of the metal structure of the lock miter gate will greatly reduce the safety and service life, and also endanger the operation safety of the lock. [0003] The metal structure of the miter gate of the ship lock is fully or partially submerged underwater all the year round. Generally, it is only possible to carry out comprehensive anti-corrosion conditions during the overhaul period. However, due to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14B05D7/16B05D5/00B05D1/02B05D3/00C23F13/08B24C1/08
CPCB05D7/14B05D7/16B05D5/00B05D1/02B05D3/002C23F13/08B24C1/086C23F2213/31
Inventor 胡志芳陶然张杰覃祥孝齐俊麟覃盼陈明华梁锴王卫东陶如豪延芳超
Owner THREE GORNAVIGATION AUTHORITY
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