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Topic: Corrosion


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In the News (Thu 25 Apr 19)

  
  Wiley-VCH - Materials and Corrosion
Materials and Corrosion is the leading European journal in its field, providing rapid and comprehensive coverage of the subject and specifically highlighting the increasing importance of corrosion research and prevention.
Materials and Corrosion provides you with strictly peer-reviewed, high-quality papers on all aspects of the behavior of materials in corrosive environments as well as corrosion testing and protection.
Several sections exclusive to Materials and Corrosion bring you closer to the current events in the field of corrosion research and add to the impact this journal can make on your work.
www.wiley-vch.de /publish/en/journals/alphabeticIndex/2010   (131 words)

  
  Corrosion - Wikipedia, the free encyclopedia
Corrosion is deterioration of intrinsic properties in a material due to reactions with its environment.
Corrosion can be concentrated locally to form a pit or crack, or it can extend across a wide area to produce general deterioration.
A common example of corrosion protection in ceramics is the lime added to soda-lime glass to reduce its solubility in water; though it is not nearly as soluble as pure sodium silicate, normal glass does form sub-microscopic flaws when exposed to moisture.
en.wikipedia.org /wiki/Corrosion   (2463 words)

  
 Corrosion - MSN Encarta   (Site not responding. Last check: 2007-10-15)
The most familiar example of corrosion is the rusting of iron, a complex chemical reaction in which the iron combines with both oxygen and water to form hydrated iron oxide.
In the presence of corrosive solutions, an electric potential is set up between the iron and the zinc, causing the zinc to dissolve but protecting the iron as long as any zinc remains.
The corrosion resistance of glass and concrete can be greatly increased by changes in their composition.
encarta.msn.com /encnet/refpages/RefArticle.aspx?refid=761572244   (565 words)

  
 Stainless Steel - Corrosion Resistance
Corrosion whereby there is a general uniform removal of material, by dissolution, eg when stainless steel is used in chemical plant for containing strong acids.
The corrosion resistance of a stainless steel is dependent on the presence of a protective oxide layer on its surface, but it is possible under certain conditions for this oxide layer to break down, for example in reducing acids, or in some types of combustion where the atmosphere is reducing.
Intergranular corrosion is a form of relatively rapid and localised corrosion associated with a defective microstructure known as carbide precipitation.
www.azom.com /details.asp?ArticleID=1177   (2185 words)

  
 MAS Note-Galvanic Corrosion
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.
However, corrosion of the large aluminum plate in couple B will be much less, even though the potential difference is the same in each case.
www.ocean.udel.edu /seagrant/publications/corrosion.html   (1214 words)

  
 Corrosion   (Site not responding. Last check: 2007-10-15)
Corrosion tests were run to verify the cause of the corrosion and to determine chemistry as well as temperature limits for the process.
Corrosion on aluminum jackets for insulated steam lines at Redstone Arsenal were studied and remedial methods were recommended.
Severe stress corrosion cracking was identified as the cause of failure of an automotive stainless steel hose clamp.
www.metalconsult.com /corrosion.html   (687 words)

  
 The Basics of Corrosion
Corrosion is a natural process that seeks to reduce the binding energy in metals.
In corrosion parlance, the site where metal atoms lose electrons is called the anode, and the site where electrons are transfered to the reducing species is called the cathode.
Corrosion is essentially an electric circuit, since there is a flow of current between the cathode and anode sites.
www.efunda.com /materials/corrosion/corrosion_basics.cfm   (341 words)

  
 Corrosion
The corrosion resistance of Nickel 200 makes it particularly useful for maintaining product purity in the handling of foods, synthetic fibers, and caustic alkalies; and also in structural applications where resistance to corrosion is a prime consideration.
The outstanding and versatile corrosion resistance of InconelĀ® alloy 625 under a wide range of temperatures and pressures is a primary reason for its wide acceptance in the chemical processing field.
The chromium in the alloy imparts resistance to oxidation and corrosion.
www.painc.com /corrosion.htm   (1355 words)

  
 Protective Paints, Coatings, Linings and Corrosion Forum
Corrosion is usually referred to as the degradation of the metal by chemical or electrochemical reaction with its environment.
When considered broadly, corrosion may be looked upon as the tendency of the metal to revert to its natural state similar to the oxide from which it was orginally smelted.
Corrosion.: Is the detereoration of a substance (Usually a Metal), or its properties because of a reaction with its environment.......
www.corrosion.com /corroforum/topic.asp?TOPIC_ID=386   (172 words)

  
 Corrosion   (Site not responding. Last check: 2007-10-15)
Much of this loss is due to the corrosion of iron and steel, although many other metals may corrode as well.
This is due to the fact that the dissolved salt increases the conductivity of the aqueous solution formed at the surface of the metal and enhances the rate of electrochemical corrosion.
This is one reason why iron or steel tend to corrode much more quickly when exposed to salt (such as that used to melt snow or ice on roads) or moist salty air near the ocean.
library.kcc.hawaii.edu /external/chemistry/everyday_corrosion.html   (477 words)

  
 Corrosion Capability Brief
Photograph of corrosion on the Al portion of a Au/Al wirebond in a microelectronic device.
Corrosion mechanisms and electrochemical processes are addressed with both traditional and nontraditional techniques.
Interfacial and surface chemistry is studied using electron and ion spectroscopies in an ultrahigh vacuum environment and with complementary analyses in a contiguous electrochemical chamber.
www.sandia.gov /materials/sciences/factsheets/Corrosion.html   (732 words)

  
 Corrosion - Boats and Yachts Maintenance and Troubleshooting
The basic mechanism of stray current corrosion is the same as all other types, only this time the introduction of an outside source of electricity screws up the normal electrical balance of the boats metals, plus adding one other pernicious problem.
These are almost always older boats where corrosion is already present, as it is the crystalline nature of metallic oxides that exacerbates the rate of corrosion.
AC current corrosion occurs much less frequently, mainly due to the fact that the high voltage is dangerous, and it is treated with more respect.
www.yachtsurvey.com /corrosion.htm   (5550 words)

  
 Corrosion Failure Analysis and Corrosion Prevention Services
Corrosion is chemically induced damage to a material that results in deterioration of the material and its properties.
Corrosion can seldom be totally prevented, but it can be minimized or controlled by proper choice of material, design, coatings, and occasionally by changing the environment.
Stress corrosion cracking necessitates a tensile stress, which may be caused by residual stresses, and a specific environment to cause progressive fracture of a metal.
www.materialsengineer.com /CA-corrosion.htm   (237 words)

  
 Corrosion and How Thermal Spray Coatings Can Help
Corrosion is an electrochemical process in which a metal reacts with its environment to form an oxide or other compound.
The anode is the site at which the metal is corroded; the electrolyte is the corrosive medium; and the cathode (part of the same metal surface, or of another metal surface in contact with it) forms the other electrode in the cell and is not consumed in the corrosion process.
The corrosion of the steel is either reduced because of the formation of an opposing hydrogen electrode, i.e.
www.gordonengland.co.uk /corrosion.htm   (1685 words)

  
 What is Corrosion?   (Site not responding. Last check: 2007-10-15)
Corrosion of a steel tank or copper pipe is an electrical and chemical deterioration of the metal.
Because of this, the corrosion rate can be measured in milliamps and is affected by resistance and voltage differences.
The chemical component of corrosion involves the combination of water ions, oxygen and other negatively charged ions with positively charged iron to form iron oxide which we call rust.
www.anodesystems.com /pro2.html   (322 words)

  
 Corrosion
Corrosion is technically, oxidation of metals, initiated by the reaction of Oxygen with the Metal in presence of moisture.
But, the degree of corrosion is very very low and is visible in form of Black discolouration, called tarnishing, produced by formation of silver sulfide.
Seawater corrosion is one of the very important phenomena, which results in to losses due to corrosion running in hundreds of crores of rupees.
sreechem.com /Corrosion.htm   (1141 words)

  
 Corrosion in Nuclear Power Plants
Stress corrosion cracking is the growth of cracks in metallic materials, enhanced by both stress and corrosion.
Transpassive corrosion involves the dissolution of chromium from the surface of stainless steel and nickel-base alloys.
It is suspected that transpassive corrosion affects the initiation of irradiation assisted stress corrosion cracking.
www.azom.com /details.asp?ArticleID=1196   (701 words)

  
 Corrosion
Corrosion is an example of a type of electrochemical reaction, since a substance -oxidizing agent- oxidizes a metal in its environment.
Another method of reducing corrosion is to polarize or shift the potential of the metal enabling it to act as a cathode (rather than an anode) in an electrochemical cell.
These compounds can prevent either the anode or the cathode reaction of corrosion cells; one way that they can do this is by forming insoluble films over the anode or cathode sites of the cell.
www.chem.queensu.ca /PROGRAMS/UG/Firstyearlabs/112&116/labman/manual/lab10   (1760 words)

  
 A Study on the Potential of Metal Corrosion by Sulfate-Reducing Bacteria in Animal Buildings
After incubation for five to seven days, the number of bacterial colonies on the nutrient agar plates was counted and the bacterial concentration on the given area was calculated by multiplying the counts by the dilution level.
Therefore, whether these corrosion compounds were present on the corroded metal surfaces would give an indication of the level of SRB corrosion.
Since no SRB-related mechanisms of corrosion were found in this study in the formation of these corrosion compounds, it could be concluded that the contribution of SRB to the metal corrosions in all test buildings is insignificant.
www.age.uiuc.edu /bee/RESEARCH/corrosion/Srb.htm   (3801 words)

  
 David Stevens IEng - Bearing failures - Bearing CORROSION
The salts that are present in fresh water constitute, together with the water, an electrolyte which causes galvanic corrosion, known as water etching.
An instance of this is the corrosion that occurs when there is relative movement between bearing ring and shaft or housing, on account of the fit being too loose.
As a result of the fretting corrosion, the bearing rings may not be evenly supported and this has a detrimental effect on the load distribution in the bearings.
www.vibanalysis.co.uk /technical/corrosion/corrosion.html   (389 words)

  
 Stainless Steel Corrosion, failure, care, oxidation, rusting, rust
"Corrosion is always a problem in a saltwater environment, particularly when you mix antagonistic materials such as aluminum and stainless or stainless and carbon fiber; these materials are on different points on the galvanic scale, and when joined by the conductive medium of salt water they set up an electrical potential.
The most likely places for galvanic corrosion to occur are at the mast step, under sail tracts, and under winches.
Contrary to what the name implies, the stuff does stain, mostly from bits of mild steel scraped off the extruding dies when the wire is formed.
www.bosunsupplies.com /Corrosion.cfm   (767 words)

  
 Corrosion
The investigation of complex corrosion failures may require multidisciplinary testing and analysis to determine the root cause of failure.
The Corrosion Testing and Product Development Laboratory, located in Pittsburgh, Pennsylvania, has been in existence since 1993 and is one of the premier corrosion testing and inspection facilities in North America.
Corrosion team is comprised of certified and experienced personnel from a variety of technical disciplines including: corrosion engineering, cathodic protection, paint inspection, chemistry, metallurgy, and materials science.
www.matcoinc.com /?type=cc&id=339   (1566 words)

  
 [No title]   (Site not responding. Last check: 2007-10-15)
The cost of corrosion is difficult to determine, but is known to be very large.
Studies by the National Bureau of Standards (NBS) estimated that overall corrosion costs in the United States are 4.2% of the Gross National Product (GNP)[1] or $290 billion in 1996.
It is estimated that corrosion costs are $4 billion annually for military aircraft systems and $9 billion for commercial and private aircraft [3].
www.lycos.com /info/corrosion--years.html   (342 words)

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