Cathodic Protection (Zinc Sacrificial Anode)

Zn → Zn²⁺ + 2e⁻

نظرة عامة

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.

المشاركون

الدور	المادة	المعامل	الحالة
متفاعل	Zinc Zn	1	(s)

مثال من الحياة اليومية

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

الأهمية الصناعية

Cathodic protection prevents billions of dollars in corrosion damage annually to ships, pipelines, bridges, and offshore platforms.

الخصائص

النوع: Electrochemical
قابل للعكس: لا
الطاقة: طارد للحرارة
ΔH: -147,0 kJ/mol

التفاعلات ذات الصلة

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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.