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Impressed current cathodic protection local repair device of floating platform and repair method thereof

A floating platform, cathodic protection technology, applied in the field of marine metal anticorrosion, can solve the problems of different protection currents, pollution, marine environment damage, etc., to reduce the risk of operation, reduce operation time, and ensure the effect of personal safety.

Active Publication Date: 2022-01-28
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 local repair device of floating platform and repair method thereof
  • Impressed current cathodic protection local repair device of floating platform and repair method thereof
  • Impressed current cathodic protection local repair device of floating platform and repair method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Sacrificial anode failure due to ship collision, exhaustion of the anode itself or the surface of the sacrificial anode covered with marine organisms;

[0090] The reliability of the device is verified by simulating the actual sea state test on the scale model, and controlling the on-off of the sacrificial anode and the platform by changing the electrical connection between the sacrificial anode and the model platform to simulate the shedding 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 ocean floating platform 7, and the real-time feedback information through the potential monitoring software finds that the potential near the sacrificial anode of the platform is -950mV (Ag / AgCl). The electrical connection between the anode and the platform was disconnected, and the potential near the sacrificial anode was found to be -745mV (Ag / ...

Embodiment 2

[0097] Due to the collision of ships, the aging and peeling of the coating itself, and the super typhoon, the local coating on a certain part of the surface of the floating platform is damaged;

[0098] By simulating the actual sea state test on the scale 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 through the potential monitor 4 installed on the marine floating platform 7, and the information is fed back in real time through the potential monitoring software. It was found that the potential distribution of the whole platform was between -700 and -750mV. At this time, the potential monitor 4 would alarm. The software judged the location of the coating damage through calculation. Personnel entered the water to check to determine the damage of the coating, and desig...

Embodiment 3

[0105] Due to the collision of ships, the aging and peeling of the coating itself, and the super typhoon, the partial coating on the surface of the floating platform was damaged; due to the collision of ships, the exhaustion of the anode itself, or the surface of the sacrificial anode was covered with marine organisms, the sacrificial anode failed.

[0106] By simulating the actual sea state test on the scale model, the damage rate of the platform is preliminarily assumed to be 4%, that is, the local small area falls off, and the sacrificial anode of the test platform is closed, that is, the sacrificial anode fails to verify the reliability of the device; the specific repair Proceed as follows:

[0107] 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 information is fed back in real time through the potential monitoring software; it is found that the potential distribution of the ...

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Abstract

The invention discloses an impressed current cathodic protection local repair device of a floating platform and a repair method thereof, and relates to the technical field of marine metal corrosion prevention, in particular to the impressed current cathodic protection local repair device of the floating offshore platform and the repair method thereof. Current control equipment is arranged in a waterproof junction box; a net-shaped auxiliary anode and a reference electrode are arranged outside the ocean floating platform, are fixed on a composite cable through an auxiliary anode sealing structure and a reference electrode sealing structure, and are connected with an electric wire in the composite cable; the composite cable is wound on a pay-off device; and the head end of the composite cable is electrically connected with the current control device, and the tail end is connected to a sacrificial anode protection frame. According to the technical scheme, the problems that in the prior art, due to the fact that an ocean platform is complex in structure, the position of a to-be-repaired area is uncertain, and protection currents needed by the to-be-repaired area are different, a cathode protection repairing system device capable of being flexibly arranged needs to be designed according to the actual damage condition are solved.

Description

technical field [0001] The partial repairing device for impressed current cathodic protection of a floating platform and the repairing method thereof of the present invention relate to the technical field of marine metal anticorrosion, in particular to the local repairing device for impressed current cathodic protection of a floating offshore platform and the repairing method thereof. Background technique [0002] Floating platform is a kind of steel structure platform, which is widely used in drilling platform and construction platform. This ocean platform floats above the ocean using moorings. Since seawater is a strong corrosive medium, if effective anti-corrosion measures are not taken, the floating platform will suffer from corrosion and damage in the harsh marine environment, which will shorten the service life of the platform and cause losses to the national economic property. [0003] Corrosion protection of steel structure platforms in marine environment generally ...

Claims

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Application Information

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Patent Type & Authority Applications(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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