High-potential sacrificial magnesium alloy anode and manufacturing method thereof

Abstract

The invention provides a high-potential sacrificial magnesium alloy anode and a manufacturing method thereof. The high-potential sacrificial magnesium alloy anode comprises the following chemical components in percentage by weight: 0 to 0.4 percent of Zn, less than or equal to 0.01 percent of Al, less than or equal to 0.02 percent of Si, less than or equal to 0.05 percent of Mn, less than or equalto 0.03 percent of Fe, less than or equal to 0.003 percent of Ni, less than or equal to 0.005 percent of Cu, and the balance of Mg; besides, the potential of the high-potential sacrificial magnesiumalloy anode is more than -1.70 volts, and the current efficiency is over 50 percent. The high-potential sacrificial magnesium alloy anode has a simple manufacturing process and low cost, and has the electrical property in accordance with the prescriptions of an ASTM standard.

Description

technical field [0001] The invention relates to a magnesium alloy sacrificial anode, in particular to a novel low-cost high-potential magnesium alloy sacrificial anode. Background technique [0002] The corrosion of metal materials spreads all over the national economy. The direct and indirect economic losses caused by corrosion are very 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] There are many ways to prevent metal corrosion, and the use of electrochemical cathodic protection is one of the most important methods. The use of cathodic protection is an important metal corrosion protection measure. When the metal is immersed in the electrolyte, chemical reactions are easy to occur. According to the principle of electrochemistry, electrochemical corrosion...

AI Technical Summary

Problems solved by technology

The high temperature will make the magnesium melt easier to oxidize and bring in more oxides, and the oxides will seriously reduce the potential and current efficiency of the high-potential magnesium alloy sacrificial anode

And manganese chloride (MnCl2) absorbs moisture easily again, and steam is very dangerous to the magnesium of molten state, even has the possibility of explosion, and the content of nickel and iron in the manganese chloride is very high, can introduce new impurities

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