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What is the relationship between the selection of aluminum anode block composition
- Author:Libo
- Source：wlvcheng-tv.com
- Date：2021-06-11
- Click：0
Aluminum anode is mainly used for buried pipeline (tap water/oil/gas company), water/oil storage tank anti-corrosion, wharf steel pile/pier anti-corrosion, shipyard, power plant, oil field facilities and other metal protection.
Aluminum zinc indium cadmium alloy is suitable for inner wall of oil storage tank, aluminum zinc indium magnesium titanium is suitable for use in sewage...... The actual use of the design element will give the appropriate composition requirements.
Chemical composition
Zn | In | Cd | Sn | Mg | Si | Ti | Impurities, not greater than | Al | |||
Si | Fe | Cu | |||||||||
Al-Zn-In-Sd | 2.5-4.5 | 0.018-0.050 | 0.005-0.020 | - | - | - | - | 0.10 | 0.15 | 0.01 | allowance |
Al-Zn-In-Sn | 2.2-5.2 | 0.020-0.045 | - | 0.018-0.035 | - | - | - | 0.10 | 0.15 | 0.01 | allowance |
Al-Zn-In-Si | 5.5-7.0 | 0.025-0.035 | - | - | - | 0.10-0.15 | - | 0.10 | 0.15 | 0.01 | allowance |
Al-Zn-In-Sn-Mg | 2.5-4.0 | 0.020-0.050 | - | 0.025-0.075 | 0.50-1.00 | - | - | 0.10 | 0.15 | 0.01 | allowance |
Al-Zn-In-Mg-Ti | 4.0-7.0 | 0.020-0.050 | - | - | 0.50-1.50 | - | 0.01-0.08 | 0.10 | 0.15 | 0.01 | allowance |
Electrochemical performance
| Open circuit potential -V(SCE) | Working potential -V(SCE) | Actual capacitanceA·h/kg | Current efficiency% | soluble |
Ordinary aluminum sacrificial anode | 1.10-1.18 | 1.05-1.12 | ≥2400 | ≥85 | The corrosion products are easy to fall off, and the surface dissolves and moistens |
High efficiency aluminum sacrifice anode | 1.10-1.18 | 1.05-1.12 | ≥2600 | ≥90 | |
High activated aluminum alloy sacrifice anode | 1.45-1.50 | 1.40-1.45 | ≥2080 | ≥70 |
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