Method for on-line detection of failure of marine ship pipeline isolation galvanic couple connection insulation pad
A technology of insulating mats and ships, applied in the direction of material resistance, etc., can solve problems such as reducing equipment service life, increasing maintenance costs, risk of major accidents, galvanic corrosion and corrosion, and achieves the effect of efficient management of corrosion behavior
Pending Publication Date: 2022-04-22
山东龙港硅业科技有限公司
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Problems solved by technology
However, due to common reasons such as the aging and failure of insulating mats in long-term operation and the reduction of insulation capacity, and the complexity of many coupling devices and imperfect construction destroying the insulating properties of gaskets, etc., the galvanic corrosion of ship piping systems in long-term operation is difficult. Avoid, frequent galvanic corrosion corrosion accidents
Some new ships have galvanic corrosion pipeline perforation accidents within a few months, which reduces the service life of equipment and increases maintenance costs and the risk of major accidents
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[0037] The technical solution of the method for detecting galvanic corrosion of the pipeline system of the present invention will be further described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only exemplary examples of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0038] As mentioned above, parallel measurement is the only feasible method for on-line measurement, but the real insulation resistance cannot be obtained by measuring the DC resistance of the insulating mat due to the parallel shunting of seawater, and the isolation performance of the insulating mat cannot be accurately evaluated. However, by measuring the AC impedance response of the pipeline insulating mat, th...
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The invention relates to a method for online detection of failure of an insulation pad connected with an isolation galvanic couple of a marine ship pipeline. The invention relates to a method for rapidly and reliably detecting / monitoring the aging failure degree of an isolation insulation pad between seawater pipelines of a marine ship in order to prevent galvanic corrosion of a ship multi-metal pipeline system due to the fact that the insulation pad loses the isolation capacity due to aging failure. Comprising the steps that the value of the low-frequency real part intercept of the parallel alternating-current impedance spectroscopy of the insulation pad between the ship pipelines is measured on line, so that the failure degree of the isolation insulation pad between the multiple metal pipelines is evaluated, the insulation performance of the insulation pad between the pipelines can be reliably detected, and the situation that equipment is subjected to galvanic corrosion to increase the service risk is avoided.
Description
technical field [0001] The invention relates to a detection method for preventing galvanic corrosion in a multi-metal pipeline system of a ship, in particular to a method for rapidly detecting / monitoring the failure degree of the isolation insulation pad for preventing galvanic connection between seawater pipelines of a marine ship. Background technique [0002] Large ocean ships are equipped with complex seawater piping systems. Since the pipeline is composed of a variety of metals and forms a galvanic corrosion system due to seawater short circuit, and the hull and various equipment are loaded with cathodic protection, which is coupled with the pipeline as a whole through seawater to form a multi-metal coupling current + cathodic protection current + The complex galvanic corrosion system formed by stray currents threatens the safe operation of hull equipment. The detection and control of galvanic corrosion in marine ship piping has always been the most concerned service s...
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IPC IPC(8): G01N27/20
CPCG01N27/205
Inventor 王敬伟王佳
Owner 山东龙港硅业科技有限公司