Cathodic Protection (Zinc Sacrificial Anode)

Zn → Zn²⁺ + 2e⁻

ภาพรวม

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.

ผู้เข้าร่วม

บทบาท	สาร	สัมประสิทธิ์	สถานะ
สารตั้งต้น	Zinc Zn	1	(s)

ตัวอย่างในชีวิตประจำวัน

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

ความสำคัญทางอุตสาหกรรม

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

คุณสมบัติ

ประเภท: Electrochemical
ย้อนกลับได้: ไม่
พลังงาน: คายความร้อน
ΔH: -147.0 kJ/mol

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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.