High-Temperature Zinc Anode with a Rectangular Shape.
Specialized High-Temperature Zinc Anode: Protects against intergranular corrosion at elevated temperatures up to 90°C, ideal for liquid cargo tanks, hot subsea pipelines, and heat exchangers.
Description
Common zinc alloys are prone to failure when exposed to temperatures exceeding 60°C, especially in saline mud where intergranular corrosion is a concern. High temperatures can render traditional zinc anodes ineffective or even harmful to the iron and steel structures they are meant to protect through cathodic protection (CP). This is due to passivation and polarity reversal, a critical condition where zinc and steel switch their natural polarities, causing steel to corrode while protecting the zinc anode.
To address the demand for anodes in high-temperature applications, we’ve developed a specialized zinc anode capable of operating effectively at temperatures up to 90°C.
Our high-temperature zinc anode is specifically designed for use in tanks carrying liquid cargo exposed to high temperatures, hot subsea pipelines, and heat exchangers.
Quality Substrate Material
The exceptional electrochemical performance of the high-temperature zinc anodes is guaranteed through meticulous control of the alloy elements’ composition integrated into the zinc substrate.
| Element | ≤ 50°C | 50°C ~ 90°C |
| Aluminum (Al) | 0.005% max. | 0.1% ~ 0.25% |
| Magnesium (Mg) | — | 0.05% ~ 0.15% |
| Lead (Pb) | 0.003% max. | 0.006% max. |
| Iron (Fe) | 0.0014% max. | 0.002% max. |
| Copper (Cu) | 0.002% max. | 0.001% max. |
| Cadmium (Cd) | 0.003% max. | 0.001% max. |
| Total Impurities | — | 0.1% max. |
| Zinc (Zn) | Remainder | Remainder |
Excellent Electric Capacity
The capacity of high-temperature zinc anodes is evaluated based on the guidelines outlined in the DNVGL-RP-B401 standards.
| Technical Measurement | 20°C | 60°C | 80°C | 90°C |
| Closed Circuit Voltage (-V) | 1.03 | 1.01 | 0.98 | 0.95 |
| Current Capacity | 800 A.h/kg | 770 A.h/kg | 774 A.h/kg | 750 A.h/kg |
Customized Configurations
Our team of seasoned engineers is available to tailor the anode size, inserts, service life, and output current to align with your specific requirements upon your request.
| Item No. | Anode Dimensions | Insert Dimensions | Weight | |||||||
| Wt | Wb | H | La | ØD | Wc | T | Lc | N.W | G.W | |
| JA-HTZ-R50 | 4.5” (115 mm) | 5.3” (135 mm) | 4.9” (125 mm) | 18.3” (465 mm) | 0.8” (20 mm) | 3.9” (100 mm) | 0.4” (10 mm) | 31.1” (790 mm) | 112 lbs (50.8 kg) | 115.1 lbs (52.2 kg) |
Testing
We employ ISO 9001:2015 quality management system and rigorous internal testing standards to ensure the optimum lifespan and performance of our anodes. Each anode is labelled with a unique serial number for quality tracking.
| Testing Details | Chemical Composition | Electrochemical Performance | Physical Properties |
| Testing Standard | ASTM B418 | NACE TM0190 | NACE SP0387 / Foundry ITP |
| Testing Content | Chemical Analysis | Circuit Potential / Current Capacity / Current Efficiency / Electrical Resistance | Surface Finish / Dimensions & Weight / Steel Insert |
| Equipments | Optical Emission Spectrometer OBLF QSN 750 | Electrochemical Analyzer EPI 200 | Calibrated Digital Measuring Devices |
