Preparation method of corrosion-resistant magnesium alloy sacrificial anode

A sacrificial anode and magnesium alloy technology, applied in the direction of electrolytic inorganic material coating, electrolytic coating, coating, etc., can solve the problems of magnesium alloys that cannot meet the service cycle, waste of resources, waste of electronics, etc., to meet the design service cycle and reduce self Corrosion rate, overcoming the effect of large self-corrosion rate

Pending Publication Date: 2020-12-11
GUIZHOU POWER GRID CO LTD
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for preparing a corrosion-resistant magnesium alloy sacrificial anode, so as to solve the problem that most of the electrons in the magnesium alloy anode material

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[0015]A method for preparing a corrosion-resistant magnesium alloy sacrificial anode. The preparation method is as follows: firstly subject the magnesium alloy sacrificial anode material to corrosion-resistant treatment to form a corrosion-resistant layer on the surface; and then conduct conductive post-treatment on the surface of the corrosion-resistant layer to finally form Corrosion-resistant conductive magnesium alloy sacrificial anode material.

[0016]The magnesium alloy sacrificial anode material is AZ series magnesium alloy sacrificial anode material such as AZ31 or AZ91.

[0017]The corrosion resistant treatment liquid is used in the corrosion resistant treatment, and the composition of the corrosion resistant treatment liquid per liter is: 10-20 g / L trisodium phosphate, 5-10 g / L sodium tungstate, 2-5 g / L copper sulfate, 6-12 g / L sodium ethylenediaminetetraacetate, 2-5 g / L copper acetate, 10-20 g / L silicon carbide, 2-4 g / L sodium hydroxide and 5-10g / L sodium fluoride; The rest is...

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Abstract

The invention discloses a preparation method of a corrosion-resistant magnesium alloy sacrificial anode. The preparation method is characterized by comprising the following steps: 1, carrying out corrosion-resistant treatment on a magnesium alloy sacrificial anode material to form a corrosion-resistant layer on the surface; and 2, performing conductive post-treatment on the surface of the corrosion-resistant layer to finally form a corrosion-resistant conductive magnesium alloy sacrificial anode material. The technical problems that in the prior art, because the self-corrosion rate of a magnesium alloy anode material is too high, the service cycle cannot be met generally, and a large amount of magnesium alloy is consumed in a self-corrosion mode while protection is conducted are solved.

Description

technical field [0001] The invention belongs to electrochemical corrosion and protection technology, in particular to a method for preparing a corrosion-resistant magnesium alloy sacrificial anode. Background technique [0002] Sacrificial anode method is a kind of cathodic protection technology, which is commonly used in the anti-corrosion treatment field of substation grounding grid. This method electrically connects the sacrificial anode with a lower electrode potential to the protected body (ground grid) with a higher electrode potential, and inhibits the corrosion of the protected body by consuming the anode material and continuously providing electrons to the protected body; The anode materials commonly used in sacrificial anodes are zinc anodes, aluminum anodes or magnesium alloy anodes. Magnesium alloy sacrificial anode materials are rarely used. However, the electron supply capability of magnesium alloy anode materials with the same volume ratio is greater than that...

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Application Information

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IPC IPC(8): C23F13/14C25D9/06C25D3/38C25D15/00C25D5/18
CPCC23F13/14C25D9/06C25D3/38C25D15/00C25D5/18
Inventor 胡全王鑫焱陈俊卫牧灏
Owner GUIZHOU POWER GRID CO LTD
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