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High-performance and low-potential aluminum sacrificial anode materials for cathodic protection in marine engineering

A cathodic protection and marine engineering technology, applied in the field of high-performance low-potential aluminum sacrificial anode materials, can solve the problems of uneven anode dissolution and low anode current efficiency, and achieve the effect of easy falling off and uniform dissolution

Active Publication Date: 2021-03-30
SUNRUI MARINE ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are problems with low anode current efficiency or uneven anode dissolution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] 1. Preparation of sacrificial anode:

[0014] 1.1 Anode material:

[0015] Al+0.05%~0.25%Ga+0.1%~0.8%Si +0.005%~0.3%Mg+0.02%~0.15%Ti, among which the raw material of Al is Al ingot, and the impurities contained are Fe≤0.08%, Cu≤0.01% . .

[0016] 1.2 Preparation of anode material:

[0017] Low-potential sacrificial anodes require very low content of alloying elements, and have stricter requirements on the melting process. The measures taken in the present invention are timely and appropriate addition of alloy elements and strict control of other smelting process parameters. Industrial aluminum ingots with a purity of 99.85% and 99.70% are selected as raw materials, and the purity of trace alloy elements added is not less than 99.99%.

[0018] Ti, an alloying element of Tiβ phase, is added to ensure that the grain size of the anode material remains within the desired control range. Ga, Si, and Mg elements are added by master alloy technology (the master alloys used...

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PUM

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Abstract

The invention provides a high-performance low-potential aluminum sacrificial anode material applied to ocean engineering cathode protection. The material is characterized in that high-purity aluminumserves as a main raw material, elements gallium, silicon, magnesium and titanium are added, components comprise, by weight percentage, 0.05-0.25 of gallium, 0.005-0.3 of magnesium, 0.1-0.8 of silicon,0.02-0.05 of Ti, 0.04-0.08 of Fe in other impurities, and 0.01 of copper in other impurities. The material has the beneficial effects that according to the achieved technical indexes, the work potential in natural sea water is between -0.78 V(vs.SCE) and -0.85 V(vs.SCE), the surface of the anode is dissolved uniformly, corrosion products fall off easily, and the current efficiency is larger thanor equal to 80%.

Description

technical field [0001] The invention relates to a high-performance low-potential aluminum sacrificial anode material used in cathodic protection of marine engineering, and is suitable for cathodic protection of steel marine structures. Background technique [0002] Aluminum alloy sacrificial anodes have the advantages of light weight, large capacitance, and low price, and have been more and more widely used in the protection of ships and marine facilities. The electrochemical performance of aluminum alloy sacrificial anode materials mainly depends on the type, content, form and distribution of alloy elements in the aluminum anode, and the content of impurities will also affect the performance of the anode. [0003] Aluminum has a sufficiently negative potential [the standard electrode potential is -1.66 (vs. SCE)] and high thermodynamic activity, and has a small density, a large amount of electricity generated, easy-to-obtain raw materials, and low prices. It is an ideal mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F13/14C22C21/02C22C1/03
CPCC22C1/026C22C1/03C22C21/02C23F13/14
Inventor 姚萍王廷勇王辉许实王海涛
Owner SUNRUI MARINE ENVIRONMENT ENG