Cathodic Protection (Zinc Sacrificial Anode)

Zn → Zn2+ + 2e−

अवलोकन

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.

प्रतिभागी

भूमिका पदार्थ गुणांक अवस्था
अभिकारक Zinc Zn 1 (s)

रोजमर्रा का उदाहरण

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

औद्योगिक महत्व

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

गुण

प्रकार
Electrochemical
प्रतिवर्ती
नहीं
ऊर्जा
ऊष्माक्षेपी
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.