1. Introduction Our sacrificial anode (abbreviation: aluminum anode) according to GB / T 4948-2002 research and production of aluminum alloy suitable for seawater ships, machinery and equipment, ballast tanks, tank walls, coastal facilities, submarine pipes, steel pile wharf, offshore platforms, cables and other facilities of the cathodic protection of metal corrosion. 2. The chemical composition of anodic aluminum species Zn In Cd Sn Mg Si Ti impurities, not more than Al Si Fe Cu Al-Zn-In-Cd 2.5-4.5 0.018-0.050 0.005-0.02 - - - - 0.10 0.15 0.01 balance Al-Zn -In -Sn 2.2-5.2 0.020-0.045 - 0.018-0.035 - - - 0.10 0.15 0.01 balance Al-Zn-In -Si 5.5-7.0 0.025-0.035 - - - 0.10-0.15 - 0.10 0.15 0.01 balance 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 balance 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 3. aluminum anode electrochemical performance margin performance indicator species open circuit potential -V (SCE) working potential -V (SCE) actual capacity A? h / kg current efficiency% dissolved aluminum anode common condition 1.10-1.18 1.05 -1.12 ≥2400 ≥85 corrosion product is easy to fall off, the surface uniformly dissolved. Efficient 1.10-1.18 1.05-1.12 ≥2600 ≥90 anodized aluminum alloy anode high activation 1.45-1.50 1.40-1.45 ≥2080 ≥70 4. ballast tanks aluminum alloy sacrificial anodes Name Model Specification / mm Weight / kg A × (B1 + B2) × C aluminum sacrificial anodes AT-1 500 × (115 + 135) × 130 23.0 aluminum sacrificial anodes AT-2 1500 × (65 +75) × 70 21.5 aluminum sacrificial anodes AT-3 500 × (110 + 130) × 120 20.0 aluminum sacrificial anodes AT-4 1000 × (58.5 + 78.5) × 68 13.2 aluminum sacrificial anodes AT-5 800 × ( 56 + 74) × 65 10.0 aluminum sacrificial anodes AT-6 1150 × (48 + 54) × 51 9.0 aluminum sacrificial anodes AT-7 250 × (80 + 100) × 85 5.0 aluminum sacrificial anodes AT-8 200 × (70 + 90) × 70 3.0