1. Introduction Our aluminum zinc cadmium line (ZAC series) sacrificial anode product (referred to as: zinc anode) by the China Classification Society (CCS) recognized quality standards in line with GB / T4950-2002 standard chemical composition of zinc anode meet the US MIL-A-18001H and ASTM-B418 (Type 1) standard. The product has the following characteristics 1. Self-soluble zinc alloy sacrificial anodes, high current efficiency, anode current occurrence good self-regulating properties. 2. Protection of years longer, up to 20 to 30 years, and usually does not occur "over protective" phenomenon. 2, the chemical composition of the chemical elements zinc anode Al Cd impurity, not more than Cu Pb Si Zn content of Fe% 0.3-0.6 0.05-0.12 0.005 0.005 0.006 0.125 3 margin, zinc anode electrochemical properties> Performance> open circuit potential -V (SCE )> working potential -V (SCE)> actual capacity A? h / kg> current efficiency%> dissolution profile> seawater -1.09 ~ -1.05 -1.05 ~ -1.00 ≥780 ≥95> corrosion product is easy to fall off,> Surface dissolve evenly> Soil ≤-1.05 ≤-1.03 ≥530 ≥65> Note 1>: reference electrode -> saturated calomel electrode> Note 2>: Media -> seawater using artificial seawater; soil medium using moist soil , and added around the anode filler. 4, Port Engineering facilities, marine engineering facilities used zinc alloy sacrificial anodes Model Specifications Name Model Specification / mm Weight / kg A × (B1 + B2) × C zinc alloy sacrificial anodes ZI-1 1000 × (115 + 135) × 130 115.0 zinc alloy sacrificial anodes ZI-2 750 × (115 + 135) × 130 85.0 zinc alloy sacrificial anodes ZI-3 500 × (115 + 135) × 130 56.0 zinc alloy sacrificial anodes ZI-4 500 × (105 + 135) × 100 40.0