The cathode is a principal component of an anodic protection system and completes the circuit. It must provide good corrosion resistance. Its chemical composition may vary with the corrosive environment.
Suitable Cathode Materials for Anodic Protection in Different Environments
| Cathode Metal | Environment |
| Platinum-coated brass | Sulphuric acid at different concentrations |
| Stainless steel Cr-Ni steel | Sulphuric acid; liquid fertiliser nitrate solution |
| High-silicon cast iron | Sulphuric acid |
| IKhl8NIOT | Liquid fertiliser nitrate solution; ammonium hydroxide |
| Hastelloy C | Sulphuric acid; kraft pulping liquor; liquid fertiliser nitrate solution |
| Copper | Hydroxylamine sulphate |
| AISI 304 | Sulphuric acid |
| S30400 | Sulphuric acid; liquid fertiliser nitrate solution |
| Nickel plated | Electroless nickel plating bath |
Borna Electronic can design and manufacture anodic protection cathodes to meet customer requirements or project needs.