Rectangular High Temperature Zinc Anode

It is known that common zinc alloys have a tendency to fail at temperatures above 60°C. Above this temperature, zinc alloys can suffer from intergranular corrosion, especially when buried in saline mud. When at high temperature, common zinc anodes may become ineffective or even detrimental to the iron and steel structure intended to be protected by the sacrificial CP system. The zinc anode suffers passivation and polarity reversal —— a dangerous condition in which zinc and steel reverse their natural polarity and steel becomes anodic to zinc, corroding itself and protecting the anode.

To meet the demand of anode applications at high temperature, we have developed this specialized zinc anode that can operate successfully at elevated temperatures up to 90°C.

Our high temperature zinc anode is designed for use in tanks intended for the carriage of liquid cargo with high temperature exposure, hot subsea pipelines and heat exchangers.

Category:

Zinc Anodes

Tags:

HT Anode, Sacrificial Anode Cathodic Protection

Quality Substrate Material
The superior electrochemical performance of the high temperature zinc anodes is ensured by carefully controlling the proportion of alloy elements added 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 high temperature zinc anode capacity is tested in accordance with the criteria of 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
With the help of our experienced engineers, we can customize the anode size, inserts, service life and output current to meet your specific needs upon request.

Item No.	Anode Dimensions				Insert Dimensions				Weight
Item No.	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)

Main Technical Parameters

Substrate	Zinc
Shape	Rectangular
Environment	Brackish Water, Saline Mud, Seawater
Application	Pipelines, Pylon

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	ATSM 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