Extruded anodes have high current to weight ratio, are suitable to be used in where a small diameter anode is required to give enough cathodic current.
CorrTech supply extruded anodes in both high potential (Mg-Mn alloy) and low potential (AZ31 alloy). CorrTech's extruded anodes are typically suitable for all kinds of water heaters and water storage tanks, or in pre polarization of offshore structure etc.
Chemical composition %
| Alloy | Al | Mn | Zn | Ca | Si | Cu | Ni | Fe | Other Imp. |
| (max) | (max) | (max) | (Max) | (max) | (max) | each | total |
| AZ31B | 2.5-3.5 | 0.2-1.0 | 0.6-1.4 | 0.04 | 0.1 | 0.03 | 0.005 | 0.005 | --- | 0.3 |
| AZ31D | 2.5-3.5 | 0.2-1.0 | 0.6-1.4 | 0.04 | 0.05 | 0.01 | 0.001 | 0.002 | 0.01 | 0.3 |
| Mg-Mn | 0.01 max | 0.5-1.3 | --- | --- | --- | 0.02 | 0.001 | 0.03 | 0.05 | 0.3 |
| Diameter | Core eccentric | Core diameter | Straightness | Weight |
| (inch) | (inch) | (inch) | (inch/ 2 ft length) | (lbs/inch) |
| 0.500-0.020 | 0.040 | 0.135 | 0.06 | 0.015 |
| 0.675-0.020 | 0.050 | 0.135 | 0.06 | 0.025 |
| 0.700-0.020 | 1/16 | 0.135 | 0.06 | 0.027 |
| 0.750-0.020 | 1/16 | 0.135 | 0.04 | 0.031 |
| 0.800-0.020 | 1/16 | 0.135 | 0.04 | 0.035 |
| 0.840-0.020 | 1/16 | 0.135 | 0.04 | 0.038 |
| 0.900-0.020 | 1/16 | 0.135 | 0.04 | 0.043 |
| 1.050-0.020 | 1/16 | 0.135 | 0.04 | 0.057 |
| 1.315-0.020 | 1/16 | 0.135 | 0.04 | 0.089 |
| 1.561-0.016 | 1/16 | 0.188 | 0.05 | 0.125 |
| 2.024-0.024 | 1/8 | 0.188 | 0.05 | 0.208 |
| 2.562-0.024 | 1/8 | 0.188 | 0.05 | 1/3 |
MSN