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Topic: Anode

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  Anode - Wikipedia, the free encyclopedia
Diagram of a zinc anode in a Daniell's cell.
Sacrificial anodes are particularly needed for systems where a static charge is generated by the action of flowing liquids, such as pipelines and watercraft.
The opposite of an anode is a cathode.
en.wikipedia.org /wiki/Anode   (653 words)

 Sacrificial anode - Wikipedia, the free encyclopedia
A sacrificial anode is a metallic anode used in an electrochemical process where it is intended to be dissolved as part of the process.
One example is the galvanic anode used in a cathodic protection system, where the intended purpose is to prevent corrosion of a desired piece of metal (such as a ship's hull, an oil pipeline, or a water heater) by being more electronegative than the desired metal.
Another example of a sacrificial anode is the anode in an electroplating process whereby the metal in the anode replaces the metal that is depleted from the plating solution as it is deposited on the cathode.
en.wikipedia.org /wiki/Sacrificial_anode   (277 words)

 Medcyclopaedia - Anode   (Site not responding. Last check: 2007-11-07)
The load limit of a stationary anode is given by the temperature that is reached in the copper at the boundary between the tungsten target and the copper stem.
The modern rotating anode tube uses a disk-shaped anode, normally made of molybdenum, with a 1-2 mm thick surface layer consisting of an alloy of tungsten and rhenium (5-15%) (Fig.2).
Anodes with large graphite backings are therefore found in equipment where momentary high tube loads are used, for instance in CT scanners.
www.medcyclopaedia.com /library/topics/volume_i/a/ANODE.aspx   (718 words)

The possibility of the old water heater anode rod becoming broken off, and then falling to the bottom of the water heater (and then bouncing around whenever water travels inside the water heater) is what will deteriorate the water heater tank lining very quickly.
Anode rods that come installed with water heaters generally will be made of magnesium or aluminum that is wrapped around a steel core wire.
That is the theory of the anode rod.
www.plumbingsupply.com /anoderods.html   (1025 words)

 Galvanic anode - Wikipedia, the free encyclopedia
A galvanic anode, also known as a sacrificial anode, is one of the main components of a galvanic cathodic protection system used to protect metals from corrosion, by the use of a metal electrode which is itself consumed instead in an anodic oxidation reaction.
This is the galvanic anode: the pipeline is electrically connected at intervals to buried plates of magnesium.
Zinc and zinc alloys are often used for galvanic anodes, for example in salt-water cooled marine engines and on yacht propellers.
en.wikipedia.org /wiki/Galvanic_anode   (335 words)

 Oilfield Glossary: Term 'anode'
Half of an electrolytic corrosion cell in metal is called the "anode," from which metal dissolves, often leaving pits.
The anode is the part of a corrosion cell in which oxidation occurs.
Anodes (often made of Mg or Al metal) are sacrificed intentionally to protect a steel system, such as a buried pipeline or offshore platform.
www.glossary.oilfield.slb.com /Display.cfm?Term=anode   (86 words)

 Electrochemistry Dictionary
Different areas of the surface act as anode and cathode, at the anodic areas the metal is oxidized to an oxide while at the cathodic areas the dissolved oxygen is being reduced.
In contrast, in the spontaneous electrochemical reaction in a galvanic cell the hydrogen is oxidized at the anode by transferring electrons to the anode and the oxygen is reduced at the cathode by accepting electrons from the cathode.
The hydrogen is oxidized at the anode by transferring electrons to the anode and the oxygen is reduced at the cathode by accepting electrons from the cathode.
electrochem.cwru.edu /ed/dict.htm   (11055 words)

Anodes are to be manufactured, in the combination of 12.7 INCH, 19.70 INCH and 39.40 INCH long on same spacing or uneven spacing or as per the customer's option.
Linear anodes are for installing in a trench parallel to the pipe to optimize current distribution and minimize operating costs.
The anode has the same current output as the 3" x 60" silicon iron anode and is assembled within a coke-breeze backfill in the same manner.
www.tianode.com /anodes.htm   (1007 words)

 Anode plate structure patent invention   (Site not responding. Last check: 2007-11-07)
The anode plate is arranged opposite to the cathode plate, with an area that is smaller than the surface area of the cathode plate, and the anode plate is located inside the cathode plate when the display device is viewed in a plan view so that all four-side edges of the cathode plate are exposed.
The upper and lower relation between the anode plate and the cathode plate is a positional correlation between the anode plate and the cathode plate in a cross-section view.
That is, the entire portion of the anode plate is not located within the boundaries of the cathode plate which is located under the anode plate, but a portion of the anode plate extends from the edges of the cathode plate and is exposed outside the boundaries of the cathode plate.
freshpatents.com /Anode-plate-structure-dt20051110ptan20050248258.php   (1023 words)

 The "HOLMESTEAD": Electric hot water tank anode.
If the anode has rotted away such that it is less than 3/8” diameter, or has any exposed bare steel core then it needs to be replaced.
Depending on water conditions, an anode can last from one to ten years but many localities treat their water, which can have significant effect on the life of your heater and the anode.
Note that the anodes are perhaps thirty to forty inches in length.
www.holmestead.ca /reserved/hw-anode/anode.html   (772 words)

 Thermo Electron Corporation --XR3 Dual Anode X-Ray Source
In the standard configuration the anode is coated on one side with aluminium giving an X-ray Ka line at 1486.6 eV and magnesium on the other side giving a Ka line 1253.6 eV.
Electrons are emitted from the filament and strike one of the sides of the coated anode which is at a potential of up to +15 kV.
The anode is water cooled and the power supply is interlocked to the flow rate.
www.thermo.com /com/cda/product/detail/0,1055,15955,00.html   (508 words)

 Welcome To Home Energy Magazine Online   (Site not responding. Last check: 2007-11-07)
The rods on the right are unused anode rods; the far one, with a hollow PVC section, is designed to be installed as a secondary anode in the hot water outlet port.
Anodes should be checked every three or four years if water is normal and every one or two years if water is acidic or artificially softened.
Tanks with a hex head anode can be equipped with a second anode by adding a combination rod in the hot port (as many 10-year warranty tanks have).
homeenergy.org /archive/hem.dis.anl.gov/eehem/96/960510.html   (4179 words)

 anode on Encyclopedia.com
ANODE [anode], electrode through which current enters an electric device.
Alcoa to Build New Anode Plant to Serve Fjardaal in Iceland and Mosjoen in Norway.
Cathodes and Anodes The cathode is the emitting side of an electric or electronic device such as in these exampl.
www.encyclopedia.com /html/a1/anode.asp   (415 words)

 purevolume™ | Anode
The recordings found here are not necessarily Anode's defining tracks, and the instruments were all done by Marcel not a band because no one could join him in Marathon.
Anode started out in Sudbury as PeanutButterFly, they played shows around there and developed a following with the college crowd.
Two of the members then moved to Ottawa because the drummer (Alain Paquette, and Benji Jordan were going to continue with school (friggin' idiots).
www.purevolume.com /anode   (342 words)

 Vacuum power tubes, using old valves, and vacuum tube failures
Internal anode tubes are cooled by infrared radiation, by direct thermal conduction to the envelope, and through external connections via leads exiting the envelope.
Peak anode voltage in a properly tuned and properly driven amplifier approaches two times the dc anode potential, and under conditions of mistuning, load faults, or excessive drive anode voltage can be several times the dc anode potential.
Glass internal anode tubes generally have the gettering material coated on anodes, which must be operated a high temperatures to activate the getter.
www.w8ji.com /vacuum_tubes_and_vaccum_tube_failures.htm   (3832 words)

 Search Results for anode - Encyclopædia Britannica
In a battery or other source of direct current the anode is the negative terminal, but in a passive load it is the positive terminal.
The traditional method of producing X rays is based on the bombardment of high-energy electrons on a metal target in a vacuum tube.
The metallic object is made the anode in an electrolytic reaction so controlled that its high spots dissolve, until only a smooth surface...
www.britannica.com /search?query=anode&submit=Find&source=MWTEXT   (379 words)

 anode --  Britannica Student Encyclopedia   (Site not responding. Last check: 2007-11-07)
For example, in an electron tube electrons from the cathode travel across the tube toward the anode, and in an electroplating cell negative ions are deposited at the anode.
Unmodified, the term applies to a control grid, which is ordinarily placed between a cathode and an anode (or plate) of an electron tube to initiate or vary the current between two or more electrodes.
The workpiece serves as the anode and is separated by a gap of 0.001 to 0.030 inch (0.025 to 0.75 millimeter) from the tool, which serves as the cathode.
www.britannica.com /ebi/article-9007703   (576 words)

 The Magnetron Tube: Structure and Operation
A magnetic field imposed on the space between the anode (plate) and the cathode serves as the grid.
The anode operates in such a way that alternate segments must be connected, or strapped, so that each segment is opposite in polarity to the segment on either side.
The direction of the force is such that the electron proceeds to the anode in a curve rather than a direct path.
www.gallawa.com /microtech/magnetron.html   (1100 words)

 Duracell: Technical/OEM
The anode material of the alkaline cell is a powdered zinc metal.
Manufacturing of the zinc powder is carefully controlled to ensure chemical purity and correct particle size, resulting in good surface area available during the cell reaction.
This inhibits the dissolution of the zinc anode and extends the shelf life.
www.duracell.com /oem/Primary/Alkaline/alkactcomp.asp   (314 words)

 Purged anode low effluent fuel cell (US6124054)
A hydrogen-fueled fuel cell reacts residual fuel in the exhaust of the anode flow field either in a catalytic converter or by feeding the anode exhaust into the cathode oxidant stream.
Control of flow of anode exhaust into the cathode oxidant stream may be in response to a flammability sensor, a gas composition analyzer, current output, or periodically in response to a timer; the anode exhaust may be fed either upstream or downstream of the cathode air inlet blower.
an anode flow field exhaust line connecting the exhaust of said anode flow field to a hydrogen/oxidant catalytic surface, whereby hydrogen in the exhaust of said anode flow field will be combusted.
www.delphion.com /details?pn=US06124054__   (380 words)

 Anode Systems - Cathodic Corrosion Protection   (Site not responding. Last check: 2007-11-07)
Anode Systems packages MagCorp high potential magnesium anodes and IMCO Grade A Alloy magnesium anodes as well as other materials used for cathodic protection.
Anode Systems features quality, high potential MaxMagú magnesium anodes manufactured by Magnesium Corporation of America in Salt Lake City, Utah.
Anode Systems packages IMCO Recycling, Inc.'s H-1 magnesium alloy anodes for cathodic protection.
www.anodesystems.com   (267 words)

 Split-anode magnetron
Three common types of anode blocks used in electron-resonance magnetrons are shown in figure 2-27.
The anode block in view (B) is called the VANE ANODE which has trapezoidal cavities.
The first two anode blocks operate in such a way that alternate segments must be connected, or strapped, so that each segment is opposite in polarity to the segment on either side, as shown in figure 2-28.
www.tpub.com /neets/book11/45g.htm   (765 words)

 Anode Rods for Water Heaters
Anode rods preserve the life of a water heater by corroding themselves so the water heater doesn't.
Use this link for information on a similar Anode Rod for an Atwood water heaters.
Click on this link to return to Anode Rods plus an index of links to many additional RV Water Heaters and Parts.
www.pplmotorhomes.com /parts/rv-water-heaters/anode-rods.htm   (380 words)

 Battery Chemistry Tutorial and FAQ from PowerStream: Custom battery chargers and power supplies for OEMs
Unlike the metal anodes typically used in batteries, the fuels in a fuel cell are usually gas or liquid, with oxygen as the oxidant.
Lithium is gaining a lot of popularity as an anode for a number of reasons.
Note that lithium, the lightest of the metals, also has the highest standard potential of all the metals, at over 3 V. Some of the lithium cell designs have a voltage of nearly 4 V. This means that lithium has the highest energy density.
www.powerstream.com /BatteryFAQ.html   (7373 words)

 Anode Products Company, Inc.
Anode Products has been producing high quality, trouble-free filtration systems for over 40 years.
Seals, filter papers, parts and Anode bags, as well as several makes of pumps are available from Anode Products Company.
Selecting a system for chloride zinc applications, filter area must be a minimum of twice the area to achieve same flow rate.
www.anodeproducts.com   (109 words)

 Anode Rod - Atwood or Suburban Water Heaters
This anode rod protects your water heater from corrosion.
This Anode Rod attracts corrosive elements in water, so they attack the anode rod rather than the interior of your water heater's tank.
Atwood's product is made of magnesium and the Suburban anode rod model is made of aluminum.
www.pplmotorhomes.com /parts/rv-water-heaters/anode-rod.htm   (415 words)

 Fuel cell system shutdown with anode pressure control (US6413662)
A venting methodology and pressure sensing and vent valving arrangement for monitoring anode bypass valve operating during the normal shutdown of a fuel cell apparatus of the type used in vehicle propulsion systems.
If the difference in pressure differential at the beginning and end of the anode bypass closing cycle indicates that the anode bypass valve has not properly closed, a system controller switches from a normal shutdown mode to a rapid shutdown mode in which the anode inlet is instantaneously vented by rapid vents.
sensing the pressure at the anode inlet and outlet at a time when the anode bypass valve should be closed during normal shutdown and generating a second pressure differential value; and,
www.delphion.com /details?pn=US06413662__   (536 words)

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