Multielement magnesium alloy anode material for water heaters and preparation method thereof

Abstract

The invention discloses a multielement magnesium alloy anode material for water heaters and a preparation method thereof. The multielement magnesium alloy anode material for water heaters is composed of the following components in percentage by mass: 3.0-3.5% of Al, 6.0-6.5% of Zn, 0.1-0.3% of Bi, 0.1-0.3% of Sb, and the balance of Mg and inevitable impurities. The magnesium alloy anode material is free of noble elements, and is prepared by casting without compression deformation. The magnesium alloy anode material has the characteristics of low alloy low cost, simple preparation technique, uniform anode consumption and the like, is suitable for protecting the water heater internal liner in a corrosion environment, and has wide application prospects.

Description

technical field

[0001] The invention relates to the technical field of magnesium-based anodes, in particular to a multi-element magnesium alloy anode material for water heaters and a preparation method thereof. Background technique

[0002] Corrosion of metal materials causes huge economic losses. Using sacrificial anodes for electrochemical protection is an effective method to prevent corrosion of metal materials, which can improve the corrosion resistance and service life of metal materials. Magnesium alloy has good electrochemical performance, and is often used as the anode material of water heaters to protect the cathode material (water heater liner) to prolong its service life.

[0003] However, magnesium alloy anode materials used in water heaters, such as AZ31, have limited strength and electrochemical performance, and usually need to be alloyed with expensive rare earths, noble metals, or intermediate alloys, resulting in a substantial increase in alloy costs. Extru...

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