Product Parameters

Execution Standards:GB/T4950-2021 GB/T21448-2017

Main Performance: Low anode self-dissolution, high current efficiency, good self-regulation performance of anode current; long protection lifespan, up to 20-30 years, generally no 'over-protection' phenomenon occurs.

Applicable Scope:Zinc alloy sacrificial anodes are suitable for cathodic protection of metal corrosion in ships, ballast water tanks, mechanical equipment, marine engineering and port facilities, drilling platforms, port docks, condensers, water pumps in seawater media, and pipelines, cables, etc. in low resistivity soil.

Product Features:Zinc-aluminum-cadmium (ZAC) sacrificial anodes are cast from high-purity zinc and aluminum, cadmium alloy. This product is recognized by China Classification Society (CCS), and the quality standards meet GB/T4950-2021 standards. The chemical composition of zinc anodes complies with USMIL-A-18001H and ASTM+B418 (Type 1) standards. The anodes for pipelines also comply with GB/T21448-2017 'Design Specification for Cathodic Protection of Buried Steel Pipelines'. Different specifications and sizes can be customized according to customer requirements!

Quality Assurance
Supports multiple specifications customization

Suitable for various scenarios
Direct delivery from the original factory

Suitable for various scenarios
Low self-dissolution, high current efficiency

Zinc-aluminum-chromium alloy sacrificial anode

Chemical Composition

Chemical Elements	AI	Cd	Impurities not greater than				Zn
			Fe	Cu	Pb	Si
Content %	0.3-0.6	0.05-0.12	0.005	0.005	0.006	0.125	Remainder

Electrochemical Performance

Performance/Type/Index	Open Circuit Potential V(SCE)	Working Potential V(SCE)	Actual Electric Capacity (A·h/kg)	Current Efficiency (%)	Dissolution Status
In Seawater	-1.09~-1.05	-1.05~-1.00	≥780	≥95	Corrosion products are easy to detach
In Soil	≤-1.05	≤-1.03	≥530	≥65

Common Sacrificial Anode Models and Specifications for Hulls                                                

Model	Specification	Weight (kg)
	Length*Width*Height (mm)
ZH-1	800*140*60	47.0
ZH-2	800*140*50	39.0
ZH-3	800*140*40	31.0
ZH-4	600*120*50	25.0
ZH-5	400*120*50 R	16.0
ZH-6	500*100*40	13.6
ZH-7	400*100*40	11.0
ZH-8	300*100*40	7.5
ZH-9	250*100*40	6.5
ZH-10	180*70*40	3.5
ZH-11	300*150*50 Double Iron Legs	14.5
ZH-12	300*150*40 Double Iron Legs	11.5
ZH-13	300*150*50 Bolt Type	12.0
ZH-14	300*150*40 Bolt Type	9.0

Common Sacrificial Anode Models and Specifications for Port Facilities and Marine Engineering                                                     

Model	Specification	Weight (kg)
	Length*(Upper Base + Lower Base)*Height (mm)
ZI-1	1000*(115*135)*130	115.0
ZI-1	750*(115+135)*130	85.0
ZI-1	500*(115+135)*130	56.0
ZI-1	500*(105+135)*100	40.0

Common Sacrificial Anode Models and Specifications for Ballast Water Tanks                                                         

Model	Specification	Weight (kg)
	Length*(Upper Base + Lower Base)*Height (mm)
ZT-1	500*(115+135)*130	56.0
ZT-2	1500*(65+75)*70	50.0
ZT-3	500*(110+130)*120	50.0
ZT-4	1000*(58.5+78.5)*68	33.0
ZT-5	800*(56+74)*65	25.0
ZT-6	1150*(48+54)*51	20.0
ZT-7	250*(80+100)*85	13.0
ZT-8	200*(70+90)*70	7.5

Bracelet Type Zinc Alloy Anode Models and Specifications   

Model	Specification	Weight (kg)
	Inner diameter * Width * Thickness * Gap mm
ZZ-1	1020*200*35*51	179.5
ZZ-2	819*60*30*51	34.5
ZZ-3	624*80*30*51	45.0
ZZ-4	513*100*30*51	45.0
ZZ-5	280*250*45*51	76.5
ZZ-6	252*250*45*51	68.5

Common sacrificial anode model specifications for storage tanks

Model	Specification R	Weight (kg)
	Length*(Upper Base + Lower Base)*Height (mm)
ZC-1	750*(115+135)*130	85.0
ZC-2	500*(115+135)*130	56.0
ZC-3	500*(105+135)*100	40.0
ZC-4	300*(105+135)*100	25.0

Common long strip sacrificial anode model specifications and common disc-shaped sacrificial anode model specifications for seawater cooling water systems

Model	Specification	Weight (kg)
	Length*(Upper Base + Lower Base)*Height (mm)
ZE-1	500*(115+135)*130	56.0
ZE-2	1000*(80+100)*80	50.0
ZE-3	500*(105+135)*100	40.0
ZE-4	500*(80+100)*80	25.0
ZE-5	400*(110+120)*50	16.0
ZE-6	300*(140+160)*40	12.5
ZE-7	200*(90+110)*40	5.5
Model	Diameter * Height (mm)	Weight (kg)
ZE-8	300*60 disc-shaped	30.0
ZE-9	360*40 disc-shaped	28.5
ZE-10	300*40 disc-shaped	20.0
ZE-11	200*50 disc-shaped	10.5
ZE-12	180*50 disc-shaped	8.5
ZE-13	120*100 disc-shaped	7.5

Common sacrificial anode model specifications for buried pipelines, storage tank outer walls, and other underground metal structures

Model	Specification	Weight (kg)
	Length*(Upper Base + Lower Base)*Height (mm)
ZP-1	1000*(78+88)*85	50.0
ZP-2	1000*(65+75)*65R	33.0
ZP-3	800*(60+80)*65	25.0
ZP-4	800*(55+64)*60	22.0
ZP-5	650*(58+64)*60	18.0
ZP-6	550*(58+64)*60	15.0
ZP-7	600*(52+56)*54	12.5
ZP-8	600*(40+48)*45	9.0

As global offshore energy, subsea infrastructure, and marine transportation industries continue expanding into deeper waters and harsher environmental conditions, the demand for high-performance cathodic protection systems has increased significantly. Among the various solutions available today, the bracelet-type zinc anode has become one of the most widely adopted and technically reliable forms of sacrificial anodes for pipelines, risers, and underwater steel structures.

Bracelet-type zinc anodes—often manufactured in semi-cylindrical pairs and mechanically fastened around pipelines—are specifically engineered to deliver long-lasting galvanic protection. These anodes are commonly installed on subsea pipelines, offshore platforms, jackets, manifolds, and marine risers, where continuous exposure to seawater would otherwise lead to severe corrosion, structural deterioration, and costly maintenance shutdowns.

One of the primary reasons for the growing popularity of bracelet-type zinc anodes is their excellent performance in saltwater environments. Zinc’s natural electrochemical properties make it highly effective as a sacrificial material, providing predictable dissolution and stable potential output over extended periods. Compared with aluminum or magnesium anodes, zinc performs reliably in colder waters and low-oxygen conditions, making it an ideal choice for subsea applications in regions such as the North Sea, Gulf of Mexico, and West Africa.

In engineering design, bracelet-type zinc anodes stand out due to their robust mechanical strength and precise dimensional tolerances. Modern manufacturing processes include advanced alloy formulation, heat treatment, computer-assisted casting, and ultrasonic quality inspection. These technologies ensure that each anode delivers consistent electrochemical performance and withstands the physical stresses associated with deepwater installation and pipeline operation. Many manufacturers now offer custom-engineered anode designs to match specific pipe diameters, coating systems, design life requirements, and offshore project standards.

Beyond corrosion protection, bracelet-type zinc anodes also contribute to improved operational safety and reduced lifecycle costs. By minimizing corrosion-related failures, they help prevent pipeline leaks, environmental pollution, and unplanned equipment downtime. A properly engineered zinc anode system can extend the operational lifespan of subsea pipelines by decades, offering a significant financial advantage to energy companies, offshore operators, and government infrastructure projects. As global energy transitions accelerate, the role of durable corrosion protection materials becomes even more essential.

The market for bracelet-type zinc anodes has grown significantly from 2023 to 2025, driven by large-scale offshore oil and gas development and the rapid expansion of offshore wind energy. Undersea power cables and support structures in offshore wind farms require effective galvanic protection to maintain long-term reliability. Zinc anodes have become a standard component in these installations due to their predictability, compliance with industry standards, and proven corrosion resistance.

In addition, developing regions across Asia, Africa, and Latin America are investing heavily in subsea pipeline networks for natural gas, potable water, and industrial transport. This infrastructure boom has further accelerated the global demand for high-quality bracelet-type zinc anodes. As environmental regulations become stricter, industries are increasingly required to implement protective systems that prevent corrosion-induced leaks and structural degradation, reinforcing the importance of sacrificial anode technologies.

Looking ahead, advancements in material science and manufacturing automation are expected to further enhance the performance of bracelet-type zinc anodes. New alloy formulations promise greater efficiency and slower consumption rates, while digital monitoring systems may allow for real-time evaluation of anode performance. These innovations will strengthen the long-term reliability of subsea assets and help industries operate sustainably in challenging marine environments.

In summary, the bracelet-type zinc anode has established itself as a foundational element in modern corrosion protection engineering. Its durability, stability, and adaptability make it indispensable for offshore pipelines, marine infrastructure, and large-scale subsea projects. As global industries continue moving toward deeper waters and more complex installations, the demand for high-performance zinc anode systems will remain strong, ensuring safe and efficient operation for decades to come.

The anode has low self-dissolution, high current efficiency, and good self-regulating performance of current generation; it has a long protection lifespan, reaching 20-30 years, and generally does not experience 'over-protection'.