Aluminum Alloy Cathodic Protection Introduction:
Commonly used aluminum alloy anodes are Al-Zn-In system and Al-Zn-Hg system anodes, which are suitable for cathodic protection of structures in seawater, such as ships, harbor industry and marine facilities, seawater cooling water system and storage tanks sedimentation water parts. Aluminum alloy anode production executes GB4948-2002 “Aluminum-Zinc-Indium alloy sacrificial anode”. The performance of aluminum anode is affected by the chemical composition of the alloy, we provide different alloy compositions to meet the requirements of customers, and we can also manufacture anodes with special specifications and chemical compositions according to the requirements of customers.
Aluminum Alloy Cathodic Protection Application:
Aluminum anode can prevent the corrosion of steel structure in seawater, widely used in ship hulls, ballast tanks, seawater pipelines, port facilities, marine engineering, drilling platforms, condensers, and soil medium pipelines and other corrosion prevention purposes.
The Anode Classification
． Ordinary Aluminum Alloy Sacrificial Anode
． High-efficiency Aluminum Alloy Sacrificial Anode
． High Temperature Resistant Aluminum Alloy Sacrificial Anode
． Trapezoidal, disc-shaped, bracelet-type sacrificial anodes.
Aluminum sacrificial anode is used in the environment of seawater in most of the metal equipment or the cathodic protection of the bottom plate inside the crude oil storage tanks can not be used in the soil environment with low chloride ion content. Aluminum sacrificial anode electrode potential of -1.05 volts, when the surrounding temperature is higher than 49 degrees Celsius aluminum sacrificial anode capacity with the temperature increases and decreases, you can refer to the formula. Z = 2500-27 (T-20), T anode operating temperature, unit °C. In a saltwater environment, the current capacity of the aluminum sacrificial anode may be reduced by half. Aluminum sacrificial anodes can be fixed directly to the structure of the equipment to be protected without the need for other substances as filler.
Aluminum Alloy Cathodic Protection Features:
1. the theoretical generating capacity is large, 3.6 times than zinc alloy sacrificial anode, according to the comparison of output capacity, aluminum alloy sacrificial anode is cheaper, suitable for manufacturing factory life sacrificial anode, stable point position, high current efficiency;
2. good performance in seawater and other media containing chlorine ions, large theoretical capacitance, protection of steel structure with automatic adjustment of protection potential;
3. rich resources of aluminum, purity higher than 99.80% of aluminum can be used as the material of aluminum sacrificial anode: small density, light weight, easy to install.