Circular Zinc Anode for Elevated Temperatures
Traditional zinc alloys are prone to failure above 60°C due to intergranular corrosion, particularly in saline mud. Elevated temperatures induce passivation and polarity reversal, rendering standard zinc anodes ineffective or potentially damaging to the structures they are meant to protect.
Description
Conventional zinc alloys can fail above 60°C due to intergranular corrosion, especially in saline mud. High temperatures cause passivation and polarity reversal, making typical zinc anodes ineffective or even harmful to protected structures. Our specialized zinc anodes are engineered to withstand temperatures up to 90°C, ideal for hot liquid cargo tanks, subsea pipelines, and heat exchangers.
Quality Substrate Material
Careful management of alloy element proportions in the zinc substrate guarantees the excellent electrochemical performance of the high temperature zinc anodes.
| 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 DNVGL-RP-B401 standards’ guidelines and requirements.
| 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 skilled engineers are available to tailor the anode dimensions, inserts, lifespan, and current output to suit your individual requirements upon request.
Testing
We adhere to the ISO 9001:2015 quality management system and stringent internal testing protocols to guarantee the best possible durability and functionality of our anodes. Every anode is affixed with a distinct serial number to facilitate quality monitoring.
| 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 |
