Cathodic Protection
| Formula / Notation | Zn → Zn²⁺ + 2e⁻ (sacrificial anode) |
|---|---|
| Also Known As | CP, sacrificial anode protection, impressed current cathodic protection (ICCP) |
What is Cathodic Protection?
Cathodic protection is a technique used to prevent corrosion of metal structures by making them the cathode of an electrochemical cell. This is achieved either by connecting the structure to a more reactive metal (sacrificial anode method) or by supplying a direct current from an external source. It is widely used to protect steel pipelines, ships, and bridges.
Formula & Notation
Other Names / Synonyms: CP, sacrificial anode protection, impressed current cathodic protection (ICCP)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Cathodic protection is a technique used to prevent corrosion of metal structures by making them the cathode of an electrochemical cell. This is achieved either by connecting the structure to a more reactive metal (sacrificial anode method) or by supplying a direct current from an external source. It is widely used to protect steel pipelines, ships, and bridges.
Cathodic protection is used on buried pipelines, offshore oil platforms, ship hulls, underground storage tanks, reinforced concrete bridges, and water heater tanks. It significantly extends service life and reduces maintenance costs in infrastructure.
Impressed current cathodic protection systems involve DC power supplies and submerged anodes that produce gases (chlorine, oxygen). Ensure adequate separation from gas sources. Overprotection (too negative potential) can cause hydrogen embrittlement in high-strength steels.
The formula or notation for Cathodic Protection is: Zn → Zn²⁺ + 2e⁻ (sacrificial anode)