
	Where results make sense

Topic: Galvanic corrosion

Related Topics

Galvanic series

Broughton

Airbus A380

	MAS Note-Galvanic Corrosion
		Galvanic corrosion, often misnamed "electrolysis," is one common form of corrosion in marine environments.
		The two major factors affecting the severity of galvanic corrosion are (1) the voltage difference between the two metals on the Galvanic Series, and (2) the size of the exposed area of cathodic metal relative to that of the anodic metal.
		Corrosion of the anodic metal is both more rapid and more damaging as the voltage difference increases and as the cathode area increases relative to the anode area.
	www.ocean.udel.edu /seagrant/publications/corrosion.html (1223 words)

	Galvanic cell - Wikipedia, the free encyclopedia
		The Voltaic pile, invented by Alessandro Volta in the 1800s, is a similar concept to the galvanic cell.
		The Galvanic cell's metals dissolve in the electrolyte at two different rates, leaving some electrons in the rest of the metal, which charges it negative with respect to the electrolyte.
		Galvanic corrosion occurs when two dissimilar metals are placed in contact with each other in the presence of an electrolyte, such as salt water, resulting in the unintentional formation of a galvanic cell and concomitant chemical reaction of the metals involved.
	en.wikipedia.org /wiki/Galvanic_cell (719 words)

	Galvanic Corrosion (Site not responding. Last check: 2007-10-21)
		Galvanic corrosion is a two way street and the effect on the other material coupled to stainless steels must always be considered.
		Galvanic corrosion occurs between weld metal and base metal, between different areas of the same metal and between different metals in water.
		Galvanic effects are spread over a large area in brackish and seawater; are confined to the immediate area of the junction in fresh water; and are often negligible in deaerated brines.
	www.key-to-steel.com /ViewArticle.asp?ID=160 (1223 words)

	Galvanic Corrosion (Site not responding. Last check: 2007-10-21)
		Galvanic corrosion is an electrochemical process which can take place when a magnesium component is in direct contact with a dissimilar metal and moisture is present to serve as a bridge between the dissimilar metals.
		In galvanic corrosion terminology, the magnesium part is referred to as the anode, the dissimilar metal is the cathode and moisture connecting the two is the electrolyte.
		Galvanic corrosion is always a concern when dealing with magnesium because magnesium is sacrificial to all other engineering metals.
	www.tagnite.com /galvanic_corrosion.htm (423 words)

	Galvanic Corrosion (Site not responding. Last check: 2007-10-21)
		Galvanic Corrosion Corrosion associated with the current of a galvanic cell consisting of two dissimilar conductors in an electrolyte or two...
		Galvanic corrosion (some times called dissimilar metal corrosion) is the process by which the materials in contact with each other oxidizes or...
		Galvanic corrosion is an electrochemical action of two dissimilar metals in the presence of an electrolyte and an electron conductive path.
	www.galvaniccorrosion.info (368 words)

	Galvanic Corrosion
		Galvanic attack can be uniform in nature or localized at the junction between the alloys depending on service conditions.
		Galvanic corrosion can be particularly severe under conditions where protective corrosion films do not form or where they are removed by conditions of erosion corrosion.
		While the potential serves as a measure of the thermodynamic driving force for galvanic corrosion, it is the galvanic corrosion current that indicates the acceleration of corrosion by the influence of the galvanic couple.
	www.corrosionsource.com /handbook/CPS/cps_a_glc.htm (348 words)

	Corrosion
		Galvanic corrosion is caused by an electric current generated by two different metals in a conducting medium such as seawater.
		A galvanic couple is a pair of dissimilar conductors (common) metals in electrical contact in an electrolyte such as seawater.
		According to American Boat and Yacht Council, a galvanic isolator is a device installed in series with the (AC) grounding (green) conductor of the shore power cable to block low voltage DC galvanic current flow, but permit the passage of alternating current (AC) normally associated with the (AC) grounding (green) conductor.
	www.boatsurveyor.com /corrosion.htm (1218 words)

	NM WAIDS Galvanic Corrosion
		Galvanic corrosion occurs when two dissimilar metals are connected electrically and are in contact with an electrolyte solution.
		When using coatings to prevent galvanic corrosion, it is important to coat the more noble metal rather than the active metal, so that when defects are introduced to the coat, the effects are not catastrophic.
		Graphitic corrosion is observed in buried cast iron pipe after many years exposure to soil; it can also be seen in cast iron cannons in ships that have been sunk at sea.
	octane.nmt.edu /waterquality/corrosion/galvanic.htm (738 words)

	The Galvanic Corrosion Trap!
		Galvanic corrosion prevention is a design selection issue that one must always be aware of, as it can arise with the simplest of decisions.
		One other important factor in the rate of galvanic corrosion is the respective amount of surface areas of each of the metals.
		Galvanic corosion is a major cause of industrial equipment failure and can be greatly reduced if the correct decisions are made at the design stage.
	www.lifetime-reliability.com /tip_016_pipe_galvanic_corrosion.html (470 words)

	Feature Article - Galvanic Corrosion: Prevention Equals Preservation - 04/03 (Site not responding. Last check: 2007-10-21)
		One type of corrosion that is often overlooked in the moldmaking industry is galvanic corrosion, which sometimes is identified wrongly as electrolysis.
		Galvanic corrosion refers to the damage induced when two dissimilar metals are coupled in a corrosive electrolyte.
		Galvanic corrosion is yet another hurdle that the entire mold and die industry must avoid in the quest for success and profitability.
	www.moldmakingtechnology.com /articles/040302.html (1517 words)

	Corrosion Control: Galvanic Corrosion and Stainless Steel (Site not responding. Last check: 2007-10-21)
		Galvanic corrosion is the most frequent cause of unexpected corrosion failures in seawater.
		So, to prevent galvanic corrosion the metals must either be at the same voltage before they are coupled, not be placed in electrical contact, or not be immersed in an electrically conductive water like seawater.
		This is because the corrosion starts inside the crevice between the screw and the metal, where it can’t be seen, then proceeds inside the metal where there is no oxygen, sometimes hollowing out the part or giving it the appearance of Swiss cheese.
	www.underwater.com /archives/arch/uw-su99.04.shtml (2886 words)

	Galvanic series
		Galvanic series relationships are useful as a guide for selecting metals to be joined, will help the selection of metals having minimal tendency to interact galvanically, or will indicate the need or degree of protection to be applied to lessen the expected potential interactions.
		In general, the further apart the materials are in the galvanic series, the higher the risk of galvanic corrosion, which should be prevented by design.
		The use of the galvanic series has to be done with caution and a basic knowledge of the environments that is a necessary part of this serious form of corrosion.
	www.corrosion-doctors.org /Definitions/galvanic-series.htm (636 words)

	Corrosion, stainless steel
		Referring to the galvanic chart you will note that passivated 316 stainless steel is located nine lines from the bottom and active 316 stainless steel is located thirteen lines from the top.
		Pit type corrosion is therefore simple galvanic corrosion, as the small active area is being attacked by the large passivated area.
		In the presence of some strong corrosives an electrochemical action is initiated between the chrome rich and chrome poor areas with the areas being low in chrome becoming attacked.
	www.mcnallyinstitute.com /04-html/4-1.html (2466 words)

	Avdel® - Technical Information - Galvanic Corrosion (Site not responding. Last check: 2007-10-21)
		Galvanic corrosion occurs when two dissimilar metals are in close contact with an electrolyte, a medium through which an electrical current can flow.
		When corrosion occurs it is the anodic metal most likely to corrode and the cathodic metal least likely to corrode.
		To reduce the likelihood of galvanic corrosion in a fastened joint, it is recommended that the designer choose metals that are grouped together in the galvanic series chart.
	www.avdel.textron.com:1100 /design_tools/galvanic.htm (225 words)

	Galvanic Corrosion - Engineers Edge (Site not responding. Last check: 2007-10-21)
		Galvanic corrosion occurs when two dissimilar metals with different potentials are placed in electrical contact in an electrolyte.
		Galvanic corrosion only causes deterioration of one of the metals.
		Galvanic corrosion is of particular concern in design and material selection.
	www.engineersedge.com /corrosion/galvanic_corrosion.htm (313 words)

	Galvanic corrosion
		Galvanic corrosion (also called ' dissimilar metal corrosion' or wrongly 'electrolysis') refers to corrosion damage induced when two dissimilar materials are coupled in a corrosive electrolyte.
		Differences in corrosion potentials of dissimilar metals can be measured in specific environments by measuring the direction of the current that is generated by the galvanic action of these metals when immersed in a given environment.
		Galvanic corrosion problems should be solved by designing to avoid these problems in the first place.
	www.corrosion-doctors.org /Definitions/galvanic-corrosion.htm (507 words)

	Avoiding Galvanic Corrosion - Applications Note
		Galvanic corrosion (also called dissimilar metal corrosion) erodes the metal, causing leaks over time.
		The galvanic corrosion rate depends on the electrical potential between the two metals.
		To avoid galvanic corrosion, we highly recommend using the same materials, or materials with similar electrical potential, throughout your cooling loop.
	www.lytron.com /support/galvanic_corrosion.htm (490 words)

	Galvanic corrosion (Barry L. Ornitz) (Site not responding. Last check: 2007-10-21)
		Thus corrosion will occur relatively slowly where the two materials are coated with a thin layer of slightly conductive dust, but it will occur quickly when the same two materials are immersed in salt water.
		Any corrosion in the joint will not only reduce the ohmic contact between the top of the antenna and its base, it will also be a nonlinear region where harmonics and intermodulation distortion will be produced.
		Galvanized iron is iron that has been coated with zinc for corrosion protection.
	www.yarchive.net /electr/galvanic_corrosion.html (3476 words)

	Galvanic Corrosion
		Many people utilized the standard galvanic series of materials in seawater to predict service performance relative to galvanic corrosion.
		In fact, this galvanic series is specific to only seawater at near ambient conditions.
		In making galvanic corrosion measurements, it is good practice to try to separate the effects if crevices between contacting materials and actual galvanic corrosion.
	www.mtec.or.th /th/research/famd/corro/galvanic.htm (347 words)

	Galvanic Corrosion
		Galvanic corrosion measurements (ASTM G-71) between drill collar and shock sleeve alloys and cyclic potentiodynamic polarization scans (ASTM G-61) on drill collar alloys for the determination of susceptibility to localized corrosion in simulated drilling fluid.
		Galvanic corrosion occurs when two dissimilar materials in electrical contact are simultaneously exposed to a corrosive fluid.
		The rate of galvanic corrosion is a function of several variables including area ratios, corrosivity of the medium, temperature, fluid velocity, nature of the materials, etc.
	www.corrosionsource.com /reports/galvCorr.htm (217 words)

	Hot Boating Tip (Site not responding. Last check: 2007-10-21)
		Galvanic corrosion is when two metals are immersed in sea water, which acts as an electrolyte.
		A galvanic cell is formed and current flows from the anode (the less noble metal which corrodes) into the electrolyte, and from the electrolyte to the cathode, the more noble metal.
		The idea behind using zinc is when galvanic corrosion occurs the zinc will act as a sacrificial metal because of its low nobility.
	catalog.com /bobpone/HotGalvanicCorrosion.htm (507 words)

	Corrosion Control - Galvanic Table
		In a galvanic couple, the metal higher in the series (or the smaller the number I have given it) represents the anode, and will corrode preferentially in the environment.
		Corollary II - The larger the relative anode area, the lower the galvanic current density on the anode, the lesser the attack.
		If these material are essentially free of corrosive agents (salts), free of acid or alkaline materials (neutral pH), and free of carbon or metallic particles, not subject to biodeterioration or will not support fungal growth, and do not absorb or wick water, then these may be considered non-metallics suitable for joining to metals.
	www.eaa1000.av.org /technicl/corrosion/galvanic.htm (1063 words)

	Preventing Galvanic Corrosion (Site not responding. Last check: 2007-10-21)
		Galvanic corrosion occurs when two dissimilar metals come in contact with an electrolyte (any medium in which an electrical current can flow).
		When corrosion does occur, the anodic material is the most likely to corrode, whereas the cathodic material is the least likely to corrode.
		To reduce the likelihood of galvanic corrosion in a fastened joint, it is recommended the designer choose materials that are grouped together, or at least close together, in the Galvanic Series chart.
	www.tfs.textron.com /appsol/galv_corr.html (709 words)

	Stop galvanic corrosion now : Safeshore!
		Galvanic corrosion explained : Yes it,s a complicated and confusing subject but we make it easy to understand : Please down load our free "Helpfiles" @ www.galvanicisolators.com.
		Galvanic isolators (zinc savers) prevent galvanic corrosion of anodes,zincs,magnesiums,shafts,propellers and all underwater fittings created by the use of marina shorepower earth connections.Use of mains power in marinas creates an increase of electrical current flowing through the underwater metals leading to deterioration of fittings often resulting in major repairs for the owner!
		Galvanic isolaters offer protection to anodes on both your own and your neighbour's vessel: zinc losses, metal fatigue, cathodic deterioration and electrolysis are all controlled by this easy to fit device.
	www.galvanicisolator.co.uk (499 words)

	Galvanic corrosion in boilers - Lenntech
		Galvanic corrosion occurs when a metal or alloy is electrically coupled to a different metal alloy.
		The most common type of galvanic corrosion in a boiler system is caused by the contact of dissimilar metals, such as iron and copper.
		Anything that results in a difference in electrical potential at discrete surface locations can cause a galvanic reaction, including: scratches in a metal surface, differential stresses in a metal, differences in temperature, conductive deposits.
	www.lenntech.com /boiler/galvanic-corrosion.htm (318 words)

	galvanic corrosion
		Galvanic corrosion tends to occur when dissimilar conducting materials are connected electrically and exposed to an electrolyte.
		The less noble material in the galvanic couple will become the anode and tend to undergo accelerated corrosion, while the more noble material (acting as a cathode) will tend to experience reduced corrosion effects.
		Galvanic current flow can be monitored using electrochemical sensors and the zero resistance ammetry (ZRA) technique.
	www.corrosion-club.com /galvanic.htm (638 words)

Try your search on: Qwika (all wikis)