HSCI Tubular Anode

Specifications

Tubular Cast Iron Anodes

1/Introduction:

All conventional impressed current anodes are consumed with time. With tubular cast iron anodes, however, effective protection is provided at a low and very uniform consumption rate. The anodes are made using the high silicon iron alloy to ASTM A 518M-99(2008) Grade 3, which is consumed at a rate of 0.2-0.5 kg/amp-yr, in seawater. This material also permits an operating current density of approximately 10-30 amp/m² in soil or freshwater and 10-50 amp/m² in seawater. To form these anodes, a centrifugal casting is employed. Using this technique, the anodes are spun during casting, to exert pressure. This pressure gives the anodes a denser, more homogeneous surface that is resistanct to deterioration. In addition to chemical composition and casting techniques, the configuration of tubular anodes also contributes to improved operating performance. Their tubular design provides greater surface area over solid cast iron anodes of identical weight. This in turn lowers anode-to-earth resistance, decreases the current density on the surface of the anode and permits any generated gases to be distributed over a larger area. The tubular design also means the wire connection can be made in the center of the anode, thus eliminating the problem of end-effect consumption.

2/Chemical Composition:

(ASTM A 518M-99(2008) Gr3)

3/Specification:

HSCI Tubular Anodes- Sand Cast