Cathodic Protection (Zinc Sacrificial Anode)

Zn → Zn2+ + 2e−

개요

A zinc sacrificial anode is electrically connected to a steel structure. Since zinc has a more negative electrode potential (-0.76 V) than iron (-0.44 V), zinc preferentially oxidizes, supplying electrons that keep the steel in its reduced (protected) state. The zinc anode is consumed over time and must be replaced.

참여 물질

역할 물질 계수 상태
반응물 Zinc Zn 1 (s)

일상 속 예시

Ships' hulls, water heaters, and underground pipelines all use zinc blocks bolted to steel for corrosion protection.

산업적 중요성

음극 보호는 선박, 파이프라인, 교량, 해양 플랫폼의 연간 수십억 달러에 달하는 부식 손실을 방지합니다.

성질

유형
Electrochemical
가역 반응
아니오
에너지
발열
ΔH
-147.0 kJ/mol

관련 반응

Electrolysis of Water Electrolytic Production of Chlorate Electrorefining of Copper Alkaline Battery Discharge Anodizing of Aluminum Chlor-Alkali Electrolysis Chrome Electroplating Nickel-Metal Hydride Battery Sodium-Sulfur Battery Electrochemical CO₂ Reduction to CO

Frequently Asked Questions

What is the equation for Cathodic Protection (Zinc Sacrificial Anode)?
The balanced equation is: Zn → Zn²⁺ + 2e⁻.
What type of reaction is Cathodic Protection (Zinc Sacrificial Anode)?
Cathodic Protection (Zinc Sacrificial Anode) is a electrochemical reaction.
Is Cathodic Protection (Zinc Sacrificial Anode) exothermic or endothermic?
Cathodic Protection (Zinc Sacrificial Anode) is exothermic (releases energy). The enthalpy change (ΔH) is -147.0 kJ/mol.