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Long life ferroalloy sacrificial anode

A sacrificial anode and ferroalloy technology, which is applied in the field of long-life ferroalloy sacrificial anodes, can solve problems such as structural pressure resistance and short service life, and achieve the effect of increasing service life and increasing anode weight

Active Publication Date: 2008-01-09
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a ferroalloy sacrificial anode assembly with suitable open circuit potential, high current efficiency, uniform dissolution and service life of at least one docking repair period. It can be installed and replaced, and can overcome the shortcomings of the existing technology, such as short service life and weak structure

Method used

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  • Long life ferroalloy sacrificial anode

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Embodiment

[0014] In this implementation, taking the protection of copper seawater pipelines as an example, the material of the anode outer casing 1 is selected to be copper, and the material composition weight percentage of the sacrificial tubular anode body 2 is: Mn, 1-6%; Cr, 1-5%; Al, 0.1~0.5% iron alloy anode (iron content is 88~98%), the performance index of this anode body material is: specific gravity: 7.84g / cm3; open circuit potential: -0.68~-0.72V (SCE); working potential: - 0.61~-0.59V (SCE); Actual capacitance > 920A.h / Kg; Current efficiency > 95%; Anode dissolves evenly. The length L of the anode body structure is determined according to the design life requirement or the installation space requirement of a specific seawater pipeline. The inner diameter of the sacrificial tubular anode body 2 is the same as that of the protected pipeline 5, and it is connected to the seawater pipeline flange through a flange during installation. The pipeline 5 is connected; when replacing, ...

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Abstract

An effective durable anodic sacrifice assembly of Fe alloy for sea water corrosion, especially for protection of copper alloy pipelines on ships or other apparatus, consists of anodic casings, tubular anodes, flanges, nuts, and pipelines. The assembly has sectional structure. The tubular anodes with diameters of (0.9-1.2) times of those of the sea water pipelines to be protected are embedded in the anodic casings with flanges at their both ends to connect with pipelines and sealed. The lengths of the said casings and anodes are regular and they comprises Mn, Cr, Al, and balanced with Fe. The heavier of the anodes, the longer of their working service life, so that they are usable for sea water pipelines that must work over a dock maintenance period.

Description

Technical field: [0001] The invention relates to an efficient and long-lived anti-corrosion ferroalloy sacrificial anode in seawater environment, in particular to a long-life ferroalloy sacrificial anode suitable for protecting copper alloy seawater pipelines for ships and other equipment in seawater environment. Background technique: [0002] Corrosion problems often occur in the seawater piping system of ships during use, and even corrosion leakage occurs. The early frequent leakage of seawater pipelines not only caused a serious reduction in the technical performance of the ship, but also greatly increased the maintenance cost of the ship and affected its normal navigation. The use of pipes with better seawater corrosion resistance is one of the ways to solve the problem, but materials such as titanium alloys and duplex stainless steel are expensive, and they are easy to cause galvanic corrosion problems to other materials in the piping system. At present, copper pipelin...

Claims

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Application Information

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IPC IPC(8): C23F13/14
Inventor 王洪仁姚萍李相波许立坤
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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