Aluminum alloy sacrificial anode used for water storage type water heater

A sacrificial anode and water heater technology, which is applied in the field of aluminum alloy sacrificial anodes, can solve the problems of poor versatility, low capacitance, and short service life of aluminum alloy sacrificial anodes, and achieve the effects of no aggravation of scale problems, uniform corrosion, and long service life

Active Publication Date: 2016-04-06
A O SMITH CHINA WATER HEATER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the low working potential, over-protection, low actual capacitance, short service life, polluted water quality and poor versatility and performance of aluminum alloy sacrificial anodes existing in the use process of current magnesium alloy sacrificial anode materials. Instability and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The weight percentage of each component of the aluminum alloy sacrificial anode material is: 0.5% zinc, 0.5% tin, the content of impurity Fe ≤ 0.20%, the content of impurity Si ≤ 0.20%, the sum of other impurities ≤ 0.30%, wherein, any other impurity content ≤0.10%, the balance is aluminum.

[0021] The graphite crucible is used for melting and alloying during the preparation, and the aluminum ingot is first melted in the heating furnace, and when it reaches 750-800°C after it is completely melted, the pure metal elements of zinc and tin are added in sequence, and then fully stirred with a graphite rod, and then Degassing refining and slagging, slag removal process, casting after standing. When casting, it can be cast directly in the mold and used as a cast anode rod, or it can be cast into a cylindrical extruded billet first, and then extruded into a rod on an extruder, and then used as an extruded anode rod after cutting to length.

[0022] After testing, its open ci...

Embodiment 2

[0024] Aluminum alloy sacrificial anode material components by weight percentage are: 2.8% zinc, 0.1% tin, 0.3% bismuth, 0.05% gallium, the content of impurity Fe ≤ 0.20%, the content of impurity Si ≤ 0.20%, the sum of other impurities ≤ 0.30% , wherein, any other impurity content ≤ 0.10%, the balance is aluminum.

[0025] The graphite crucible is used for smelting and alloying during the preparation. The aluminum ingot is first melted in the heating furnace, and when it reaches 750-800°C after it is completely melted, the pure metal elements of zinc, tin, bismuth and gallium are added in sequence, and then the graphite rod is used to fully After stirring, degassing and refining, slagging and slag removal processes are carried out, and casting is carried out after standing. When casting, it can be cast directly in the mold and used as a cast anode rod, or it can be cast into a cylindrical extruded billet first, and then extruded into a rod on an extruder, and then used as an e...

Embodiment 3

[0028] The weight percent of each component of aluminum alloy sacrificial anode material is: zinc 1.0%, tin 0.3%, bismuth 0.1%, the content of impurity Fe≤0.20%, the content of impurity Si≤0.20%, the total content of other impurities≤0.30%, wherein, any - The content of other impurities is ≤0.10%, and the balance is aluminum.

[0029] The graphite crucible is used for melting and alloying during the preparation, the aluminum ingot is first melted in the heating furnace, and when it reaches 750-800°C after it is completely melted, the pure metal elements of zinc, tin and bismuth are added in sequence, and then fully stirred with a graphite rod, Then degassing and refining, slagging, and slag removal processes are carried out, and casting is carried out after standing. When casting, it can be cast directly in the mold and used as a cast anode rod, or it can be cast into a cylindrical extruded billet first, and then extruded into a rod on an extruder, and then used as an extruded...

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Abstract

The invention relates to an aluminum alloy sacrificial anode used for a water storage type water heater. Aluminum serves as raw materials. The aluminum alloy sacrificial anode used for the water storage type water heater is prepared from, by weight, 0.5-2.8% of a zinc element and 0.1-0.5% of a tin element. Further, a bismuth element and/or a gallium element are/is added, and preferentially, the weight percent of bismuth is 0.1-0.3%, and the weight percent of gallium is 0.05-0.25%. The multi-element aluminum alloy sacrificial anode solves the problems that in the using process of a current magnesium alloy sacrificial anode material, the actual capacitance is low, the service life is short, water is polluted, and an aluminum alloy sacrificial anode is poor in universality, not stable in performance and the like.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy sacrificial anodes, in particular to an aluminum alloy sacrificial anode for water storage water heaters. Background technique [0002] The inner tank of the water storage water heater and metal parts such as heating pipes and thermocouples inside the inner tank are prone to corrosion due to long-term immersion in water, especially once the inner tank is corroded and broken down, water will leak, which greatly reduces the safety factor of the water heater , the water heater is then scrapped. One of the key factors of the service life of the water heater is the service life of the inner tank, and the life of the inner tank mainly depends on the material, manufacturing process and cathodic protection. Cathodic protection often uses a metal with a higher activity than it to be connected to the metal liner as a sacrificial anode. According to the electrochemical principle, the potential of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/14C22C21/10
CPCC22C21/10C23F13/14
Inventor 温军国韩莉史学栋陈东旭纪莲芹李祥马志新
Owner A O SMITH CHINA WATER HEATER CO LTD
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