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21mm Aluminum Alloy Solid Anode Rod 3/4 NPT 600mm Hard Water Protection for Hard Water Heater
Product Details:
| Place of Origin: | Hunan, China |
| Brand Name: | OEM |
| Certification: | ISO 9001:2015, ASTM B843 |
| Model Number: | HB-AL21-600 |
Payment & Shipping Terms:
| Minimum Order Quantity: | 10 Pieces |
|---|---|
| Price: | USD 4.50-8.00 / Piece |
| Packaging Details: | OEM branded color box with VCI moisture-resistant poly-bag, export-grade corrugated master carton |
| Delivery Time: | 5 working days for stock, 15-25 days for production |
| Payment Terms: | T/T, L/C, PayPal, Western Union |
| Supply Ability: | 50000 Pieces per Month |
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Detail Information |
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| Model: | HB-AL21-600 | Material: | Aluminum Alloy Al-Zn-In |
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| Rod Diameter: | Φ21mm | Rod Length: | 600mm |
| Thread Specification: | 3/4" NPT | Rod Type: | Standard Solid |
| Target Application: | Hard Water Heater | Core Wire Material: | Galvanized Steel |
| Alloy Standard: | ASTM B843 / GB/T 4948 | Place Of Origin: | Hunan, China |
| Highlight: | 21mm aluminum alloy anode rod,3/4 NPT hard water heater rod,600mm magnesium anode for water heater |
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Product Description
21mm Aluminum Alloy Solid Anode Rod 3/4 NPT 600mm Hard Water Protection for Hard Water Heater
Product Overview
The HB-AL21-600 Aluminum Alloy Al-Zn-In standard solid anode rod is engineered for superior cathodic protection in hard water heater applications. This anode rod provides long-lasting corrosion prevention by sacrificially protecting the tank interior, heating elements, and internal components from galvanic corrosion, extending equipment service life significantly.
Key Features
- Al-Zn-In alloy composition optimized for hard water environments
- Reduced scale buildup in water with hardness exceeding 150ppm
- Extended service life compared to magnesium in high-hardness conditions
- Current capacity exceeding 2400 Ah/kg
- Closed circuit potential -1.10V vs Ag/AgCl reference electrode
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | HB-AL21-600 |
| Material | Aluminum Alloy Al-Zn-In |
| Chemical Composition | Al Bal., Zn 2.5-5.0%, In 0.015-0.04%, Si ≤ 0.10%, Fe ≤ 0.10% |
| Rod Diameter | Φ21mm |
| Rod Length | 600mm |
| Thread Size | 3/4" NPT |
| Core Material | Galvanized Steel Wire |
| Open Circuit Potential | -1.05 to -1.12V (vs. Cu/CuSO4) |
| Current Efficiency | ≥ 85% |
| Current Capacity | ≥ 2400 Ah/kg |
| Rod Type | Standard Solid |
| Application | Hard Water Heater |
Recommended Applications
- Residential electric and gas water heaters
- Commercial and industrial hot water storage tanks
- Boiler feed water tanks and condensate return systems
- Heat exchanger and condenser water circuits
- Solar thermal water heating systems
Packaging & Branding
Available under HB Brand in custom color-box packaging or OEM neutral packaging with your logo and specifications. Each rod is individually sealed in moisture-resistant VCI poly-bag to prevent oxidation during storage and transit.
Quality Assurance
Every HB-AL21-600 anode rod undergoes spectrographic alloy composition analysis, electrochemical performance testing (ASTM G97), dimensional inspection, thread gauge verification per ANSI/ASME B1.20.1, and visual inspection for surface defects and casting integrity.
Why Choose HB Anode Rods?
HB is a trusted manufacturer based in Hunan, China, specializing in sacrificial anode production for over 15 years. Our vertically integrated facility ensures complete quality control from raw material smelting to finished product packaging. ISO 9001:2015 certified processes and rigorous batch testing guarantee consistent, reliable performance in every anode rod we ship.
