Zinc Pencil Anode: Targeted Internal Corrosion Protection‌

‌Product Overview‌
Hisea's zinc pencil anode is a compact, cylindrical sacrificial anode designed for internal cathodic protection within confined water spaces. It consists of a high-purity zinc core (sacrificial element) housed within a durable metal or plastic holder, which provides structural integrity and a secure electrical connection point. Its “pencil” shape allows for easy insertion into standard pipe plugs or custom fittings.

‌Key Features & Design Advantages‌

‌Compact & Space-Saving:‌ Ideal for protecting internal surfaces of equipment where space is limited.

‌Easy Installation & Replacement:‌ Designed to be screwed into existing or dedicated ports, allowing for quick inspection and replacement without major system disassembly.

‌Targeted Protection:‌ Provides localized sacrificial protection precisely where it's needed, combating galvanic corrosion caused by dissimilar metals in the water stream.

‌High-Purity Zinc:‌ Ensures consistent, predictable corrosion rates and stable protective current output.

‌Detailed Applications & Protection Mechanism‌

‌Marine Engines and Cooling Systems‌

‌Heat Exchangers:‌ Protects tubes and plates from galvanic corrosion between dissimilar metals (e.g., copper alloys and steel) in contact with cooling water.

‌Water-Cooled Engines:‌ Safeguards engine blocks and cooling jackets by sacrificially corroding, preventing the formation of destructive corrosion cells within the cooling passages.

‌Industrial Tanks and Pipelines‌

‌Storage Tanks:‌ Installed inside potable water tanks or industrial water storage tanks to protect the tank walls from uniform corrosion, extending tank life and maintaining water quality.

‌Pipelines:‌ Used in sections of pipelines carrying water or mildly corrosive fluids to protect the internal pipe wall, especially at vulnerable points or where different metals join.

‌HVAC Systems‌

‌Chiller Units & Cooling Towers:‌ Protects critical heat exchange surfaces and water containment areas from corrosion, ensuring system efficiency and preventing costly leaks.

‌Specifications & Ordering Information‌

‌Material:‌ High-purity zinc (Type III per MIL-A-18001 or equivalent).

‌Standard Sizes:‌ Various diameters and lengths available.

‌Holder Options:‌ Brass, steel, or plastic holders with standard pipe threads (e.g., NPT).

‌Customization:‌ Custom lengths, thread types, and holder materials can be provided.

Pictures of Zinc Pencil Anode