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Impressed current cathodic protection partial repair device and repair method for floating platform

A floating platform and cathodic protection technology, which is applied in the field of marine metal anticorrosion, can solve the problems of different protection currents, pollution, damage to the marine environment, etc., and achieve the effects of reducing operation risks, ensuring personal safety, and reducing operating costs

Active Publication Date: 2022-08-05
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, compared with the external current system, the sacrificial anode system itself will cause damage to the marine environment, and a large amount of metal ions will be released into the marine environment, causing a certain degree of pollution.
[0006] However, the location of the area to be repaired is uncertain due to the complex structure of the offshore platform, and the protection current required for the area to be repaired is also different. Therefore, it is necessary to design a cathodic protection repair system device that can be flexibly deployed according to the actual damage situation.

Method used

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  • Impressed current cathodic protection partial repair device and repair method for floating platform
  • Impressed current cathodic protection partial repair device and repair method for floating platform
  • Impressed current cathodic protection partial repair device and repair method for floating platform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] The sacrificial anode fails due to the collision of the ship, the exhaustion of the anode itself, or the surface of the sacrificial anode is covered with sea creatures;

[0090] The reliability of the device is verified by simulating the actual sea state test on the scaled model, and by changing the electrical connection between the sacrificial anode and the model platform to control the on-off of the sacrificial anode and the platform to simulate the falling off of the sacrificial anode. The specific repair steps are as follows:

[0091] 1. At this time, the overall potential of the platform is monitored by the potential monitor 4 installed on the marine floating platform 7, and the real-time feedback information through the potential monitoring software finds that the potential near the platform's sacrificial anode is -950mV (Ag / AgCl) at this time. The electrical connection between the anode and the platform was disconnected, and it was found that the potential near t...

Embodiment 2

[0097] Due to the collision of ships, the aging and peeling of the coating itself, and the super-large typhoon, the partial coating on the surface of the floating platform is damaged;

[0098] By simulating the actual sea state test on the scaled model, the platform damage rate is preliminarily assumed to be 32%, that is, a large area falls off, to verify the reliability of the device. The specific repair steps are as follows:

[0099] 1. At this time, the overall potential of the platform is monitored by the potential monitor 4 installed on the ocean floating platform 7, and the information is fed back in real time through the potential monitoring software. It is found that the potential distribution of the whole platform is -700 ~ -750mV, and the potential monitor 4 will alarm at this time. The software determines the location of the coating damage through calculation, and the personnel enter the water to check the damage of the coating, and design and layout around it. Rep...

Embodiment 3

[0105] Due to the collision of ships, the aging and peeling of the coating itself, and the super-large typhoon, the local coating on the surface of the floating platform is damaged.

[0106] By simulating the actual sea condition test on the scaled model, the damage rate of the platform is initially assumed to be 4%, that is, a small area falls off locally, and one sacrificial anode on the test platform is closed, that is, one sacrificial anode fails to verify the reliability of the device; specific repairs Proceed as follows:

[0107] 1. At this time, the overall potential of the platform is monitored by the potential monitor 4 installed on the ocean floating platform 7, and the information is fed back in real time through the potential monitoring software; it is found that the potential distribution of the entire platform is between -710 ~ -745mV, and the potential monitoring The instrument 4 will alarm, and the software will calculate and determine the cause of failure. Acc...

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Abstract

The invention relates to an impressed current cathodic protection partial repair device and a repair method for a floating platform, and relates to the technical field of marine metal anticorrosion, in particular to an impressed current cathodic protection partial repair device and a repair method for a floating offshore platform. The current control device of the present invention is installed inside the waterproof junction box; the mesh auxiliary anode and the reference electrode are arranged outside the marine floating platform, and are fixed on the composite cable through the auxiliary anode sealing structure and the reference electrode sealing structure, and are connected with the composite cable. The inner wires are connected; the composite cable is wound on the pay-off device; the head end of the composite cable is electrically connected with the current control device, and the tail end is connected to the sacrificial anode protection frame. The technical solution of the present invention solves the problem in the prior art that due to the complex structure of the offshore platform, the location of the area to be repaired is uncertain and the protection current required by the area to be repaired is also different. Therefore, it is necessary to design a cathode that can be flexibly laid out according to the actual damage situation. Protection fixes problems with system devices.

Description

technical field [0001] The invention relates to an impressed current cathodic protection partial repair device and a repair method for a floating platform, and relates to the technical field of marine metal anticorrosion, in particular to an impressed current cathodic protection partial repair device and a repair method for a floating offshore platform. Background technique [0002] Floating platform is a kind of steel structure platform, which is currently widely used drilling platform and construction platform. Such marine platforms use moorings to float above the ocean. Since seawater is a strong corrosive medium, if effective anti-corrosion measures are not taken, the floating platform will inevitably suffer from corrosion damage in harsh marine environments, which will shorten the service life of the platform and cause losses to the national economy and property. [0003] The corrosion protection of steel structure platform in marine environment generally adopts sacrif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F13/06C23F13/22C23F13/20C23F13/04
CPCC23F13/06C23F13/22C23F13/20C23F13/04C23F2213/31
Inventor 杨璐嘉郑宇峰马振平刘乐然黄一
Owner DALIAN UNIV OF TECH
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