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High petential magnesium alloy sacrificial anode material and its manufacturing method

A sacrificial anode and magnesium alloy technology, which is applied in the field of high-potential casting magnesium sacrificial anode materials, can solve the problems of complex manufacturing process, low current efficiency and high production cost, and achieve the effects of simple manufacturing process, low cost and convenient industrial production.

Inactive Publication Date: 2006-01-11
TAIYUAN UNIV OF TECH
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Problems solved by technology

But the disadvantage is that their current efficiency is not high, generally only about 50%
[0006] Magnesium alloy sacrificial anodes are divided into low potential and high potential. As high potential magnesium alloy sacrificial anodes, Mg-Mn alloys are mainly used as raw materials. In order to increase the open circuit potential, high-purity magnesium is currently used to melt Mg-Mn alloys at home and abroad. However, its manufacturing process is complex and its production cost is high

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  • High petential magnesium alloy sacrificial anode material and its manufacturing method
  • High petential magnesium alloy sacrificial anode material and its manufacturing method
  • High petential magnesium alloy sacrificial anode material and its manufacturing method

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Experimental program
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Effect test

Embodiment approach 1

[0024] The chemical composition (by mass percentage wt%) of high potential magnesium alloy sacrificial anode material is: Mn0.500%, Ce1.000%, Ca0.010%, Si≤0.050%, Cu≤0.020%, Ni≤0.001%, Fe ≤0.030%, the rest is Mg.

[0025] I. Prepare materials, 1# magnesium ingot 88%, electrolytic manganese 4%, Mg-Ca (containing Ca20%) master alloy 5% and Mg-RE (containing Ce50%) master alloy 3% and carry out preheating baking; II. Magnesium in SF 6 +CO 2 After melting under gas protection, add electrolytic manganese and NaF flux 5% / (accounting for the manganese addition amount) at 780 ° C, and add appropriate amount of Mg-Ca and Mg-RE master alloy after 10 minutes at 760 ° C for alloying treatment; III .When the temperature of the melt is controlled at 760°C, add 1.00% of the melt weight to the magnesium sacrificial anode self-made special refining agent (calculated as: MgCl 2 20%, KCl25%, BaCl 2 14%, MgF 2 15%, CaF 2 16%, NaF10%) for refining; IV. Stand still for 40 minutes, after testi...

Embodiment approach 2

[0028] The chemical composition (by mass percentage wt%) of high potential magnesium alloy sacrificial anode material is: Mn2.000%, Ce0.100%, Ca0.500%, Si≤0.050%, Cu≤0.020%, Ni≤0.001%, Fe ≤0.030%, the rest is Mg.

[0029] I. prepare materials, take by weighing 1# magnesium ingot 93%, electrolytic manganese 2%, Mg-Ca3% and Mg-RE master alloy 2% and carry out preheating baking; II. magnesium is in SF 6 +CO 2After melting under gas protection, add electrolytic manganese and NaF flux 10% / (amount of manganese added) at 800 ° C, and add appropriate amount of Mg-Ca and Mg-RE master alloy after 15 minutes at 780 ° C for alloying treatment; III. When the temperature of the melt is controlled at 780° C., add 1.50% of the melt weight to the magnesium sacrificial anode self-made special refining agent (in terms of mass percentage wt %: MgCl 2 30%, KCl21%, BaCl 2 11%, MgF 2 10%, CaF220%, NaF8%) for refining; IV. Stand still for 60 minutes, after testing the components to be qualified, ...

Embodiment approach 3

[0032] The chemical composition (by mass percentage wt%) of high potential magnesium alloy sacrificial anode material is: Mn1.000%, Ce0.600%, Ca1.000%, Si≤0.050%, Cu≤0.020%, Ni≤0.001%, Fe ≤0.030%, the rest is Mg.

[0033] I. prepare materials, take by weighing 97% of 1# magnesium ingot, electrolytic manganese 1%, Mg-Ca1% and Mg-RE master alloy 1% and carry out preheating baking; II. put magnesium in SF 6 +CO 2 After melting under gas protection, add electrolytic manganese and NaF flux 7.5% / (amount of manganese added) at 790 ° C, and add appropriate amount of Mg-Ca and Mg-RE master alloy after 12 minutes at 770 ° C for alloying treatment; III. When the temperature of the melt is controlled at 770° C., add 1.25% of the melt weight of the magnesium sacrificial anode self-made special refining agent (in terms of mass percentage wt %: MgCl 2 28%, KCl16%, BaCl 2 18%, MgF 2 20%, CaF 2 12%, NaF6%) for refining; IV. Stand still for 50 minutes, after testing the components to be qu...

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Abstract

A high-potential Mg alloy used as consumable anode for the underground oil or gas pipeline, storage tank and water pipe is prepared through micro-alloying the Mg-Mn alloy by Mg-Ca and Mg-RE intermediate alloys, and refining by use of special refining agent to obtain Mg MnRECa alloy, which contains proportionally Mn, Ce, Ca, Si, Cu, Ni, Fe and Mg. Its advantages are high open-circuit potential 1.7-1.8 (-V) and high current efficiency (55-60%).

Description

1. Technical field [0001] The high-potential magnesium alloy sacrificial anode material and the manufacturing method thereof of the present invention belong to the field of design and manufacture of light metal functional materials, and relate to a high-potential casting in which Mg-Mn alloys are alloyed with Mg-Ca and Mg-RE master alloys Magnesium sacrificial anode material. 2. Background technology [0002] The corrosion of metal materials spreads all over the national economy. The direct and indirect economic losses caused by corrosion are huge, and the impact of corrosion on the environment and ecological balance is also very significant. Therefore, problems related to metal corrosion and protection have attracted widespread attention and become an important research field in materials science. [0003] Although there are many ways to prevent metal corrosion, the use of electrochemical cathodic protection is one of the most important methods, and the use of cathodic pro...

Claims

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Application Information

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IPC IPC(8): C23F1/14C22C23/00C22C1/02C22C1/06
Inventor 张金山王红霞许春香王登峰薛永军梁丽萍
Owner TAIYUAN UNIV OF TECH
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