Zinc block is flexible, easy to install, easy to make a variety of anode length and shape, such as spiral, disk; Uniform current distribution, high current efficiency, more than 95%; Can adapt to higher resistivity environment; No need for external power supply, ribbon with continuous conductive core, less electrical connection; Can pass through narrow local occasions and difficult environment, more flexible application; Unit weight to the ground resistance is small, the current is large; It can be used as a grounding pole, release AC and lightning, and protect equipment and personal safety.

As a hull, stray current mainly occurs during ship repair, berthing and maintenance, because it is often necessary to use electric welding or other electric welding current through the hull during this period. Because of stray current corrosion of many cases, the fast 3 months will be corrosion perforation, what is more, a dalian shipping brigade of a ship, parked on the shore, using a single line for shafting welding work, lasting about 5h, corrosion damage to a cast steel propeller.