Graphite Machining/

Graphite Anodes

Graphite anodes are used to conduct electrical current into polarized electrical devices, also know as cathodic protection anodes. Cathodic protection is the process of using a more easily corroded metal as the anode of an electrochemical cell with another metal surface. It is commonly implemented in applications such as underwater or underground pipelines and storage tanks, steel piers, equipment on ships and boats, offshore platforms and reinforcement bars in large concrete structures such as tall buildings.

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Weaver Industries, Inc.
Denver, PA
717-336-7507
At Weaver Industries we specialize in manufacturing machined graphite parts and products. Our goal is to ensure that our customers get the right tools for their applications. We are leaders in the industry for our graphite machining processes which include recycling and reclaiming machined electrodes. Custom molded urethane and high quality graphite anodes are only a few of our other capabilities.
 
Industrial Graphite Sales, LLC
Harvard, IL
800-891-6469
Industrial Graphite Sales has the knowledge, experience and machining facilities required of a high quality graphite supplier. We are dedicated to maintaining a diverse stock of machined graphite products in a range of grades and capabilities; fluxing tubes, canisters, brazing fixtures, graphite anodes and other machine components are just a few examples of our prototype to production execution.
 
Becker Brothers Graphite Corporation
Maywood, IL
708-410-0700
Becker Brothers Graphite fabricates carbon graphite products for a range of applications. We combine our technical skills with our understanding of each customer's needs to produce an item that will meet and exceed their expectations. Our graphite product line includes pillow blocks, thrust washers, bearings, graphite anodes and much more. We offer a range of grades and machining options as well.
 
POCO Graphite
Decatur, TX
940-627-2121
We manufacture a full line of graphite materials available as precision machined parts for high-strength applications in aerospace and industrial products. POCO Graphite also produces EDM graphite. In addition, we are a graphite machining center that offers graphite design. We welcome your inquiries so give us a call today!
 
IGM Carbon
DuBois, PA
814-371-6280
IGM Carbon is a fully-diversified machining source for graphite products, graphite fixtures, EDM graphite, graphite rods and graphite heating elements. We offer quality machined graphite at low-costs in order to best meet the needs of your application. Call today and we will bring you exceptional graphite solutions and complete customer satisfaction.
 
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Graphite Anodes

Graphite anodes are used because they are reliable and relatively cost-effective. In the process of cathodic protection, current density or rate of transfer isn't a necessary factor of the process. It is important that the current keep flowing, but it does not need to achieve a certain rate or level. Therefore, even though graphite is a resistive material, it is highly ideal in these situations. The anodes are usually constructed from a combination of petroleum coke and coal tar pitch and are relatively easy to machine as finish or appearance is also not a determining factor in effectiveness. Used conjunctively with carbon graphite or other anode backfill, graphite anodes provide a long lasting solution and are one of the most commonly recycled graphite products as they contain few additives.

Custom specifications are often used to produce graphite anodes as they are typically application specific. Common approximate sizes are between 60 and 150mm in diameter and from 1200 to 1500mm long. The extruded graphite rods are baked in an oven and sintered to improve the density of graphite. They are typically extruded around a thin brass pin which is then connected to a cable in order to form the electrochemical cell necessary for the process of cathodic protection. Over time however, despite its durability and corrosion resistance, graphite will begin to break down, especially when used in the purpose of cathodic protection. However, some graphite anodes are treated with a non-porous quality non-conducting material such as oils, microcrystalline waxes or resins. The treatment of graphite anodes will ensure a higher level of performance, especially in wetter environments when exposure to moisture is prolonged or constant. The wax, resin or oil seals the porosity of the anode and protects it against water absorption as well as improving the stability and wear rate by reducing the electrochemical reactions within the anode. Applications such as dock-side uses and water tanks, as well as deep underground installations are recommended to pre-treat the anodes to ensure optimal performance.