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The port terminal adopts the composition of high efficiency aluminum alloy sacrificial anode
- Author:Libo
- Source：wwww.mtt.org.cn
- Date：2021-06-11
- Click：0
The port terminal adopts the composition of high efficiency aluminum alloy sacrificial anode
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
| The open circuit potential-V(SCE) | Work 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 dissolution is uniform |
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 |
The aluminum alloy sacrificial anodes used in offshore platforms are mainly of a long strip shape, with a trapezoidal section, but also rectangular, triangular or circular. The mass of the anode can be up to 310kg or more to ensure a long service life. There are 12 different mass specifications of aluminum alloy sacrificial anode for Marine engineering facilities, ranging from 23kg/ piece to 310kg/ piece.
Offshore platforms are divided into two categories according to their purpose: exploration drilling ships and oil production platforms. The former is mobile, the latter is fixed. But the two types are subjected to essentially the same corrosive environment. If the tubular pile platform is a fixed platform, its structure from top to bottom can be divided into derrick, deck and deck components, deck legs, jacket, steel pile and other five parts.
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