erosion of bedrock of a stream channel by chemical reactions between solutions in stream water and mineral surfaces

The etching, pitting or eating away of the pool or spa vessel or equipment. Caused by improper water balance, misuse of acid or acidic products or from "soft" water.

The deterioration of metal by chemical or electrochemical action resulting from exposure to weather, moisture, chemicals or other agents. A form of oxidation.

The wasting away of metal due to chemical action. In a boiler, usually caused by the presence of O2, CO2, or an acid.

to wear, away

Process of gradual eating away by chemical action.

The destruction of a material or its properties because of a reaction with its (environment) surroundings.

n: any of a variety of complex chemical or electrochemical processes, such as rust, by which metal is destroyed through reaction with its environment.

The process of eating away, rusting.

Corrosion in metal pipes occurs spontaneously by the presence of oxygen in water. Pipe corrosion is accelerated by corrosive water, high TDS, low (acidic) pH, low alkalinity, and high concentrations of chloride and sulfate ions. Iron metal pipes corrode the most, followed by zinc (galvanized iron) and copper metal pipes. Modern plastic pipes used in home construction do not corrode.

Gradual deterioration of a solid-especially a metal or alloy-due to chemical processes such as oxidation or the action of a chemical agent. Some corrosion products, like patinas, can be protective; however others, like rust, can be harmful to metals. See also Galvanic corrosion; Patina; Rust; Tarnish.

Rust corrosion is a natural process whereby metal tends to return to its natural state; ore. The micrograph below is a reflected light image of a cross-section through rusted wire mesh. The unoxidized steel reflects brightly. The rust reflects less brightly than the steel, but reflects more brightly than the aggregates and cement paste. See also oxidation.

The etching, pitting or eating away of a material by chemical action.

Destruction of a material (rock, mineral, metal, etc.) by chemical reaction with a substance.

Detrimental change in the size or characteristics of material under conditions of exposure or use. It usually results from chemical action either regularly and slowly, as in rusting (oxidation), or rapidly, as in metal pickling.

the act of disintegrating; breaking up due to chemical action.

is a phenomenon which takes place in carbon steel power plant water systems.  The inside metal pipe will continually corrode due to galvanic action, forming a magnetite coating as erosion (due to high water velocity and/or changes in flow direction) continually wears away the magnetite layer, permitting the corrosion layer to reform, etc.  The continual combination of effects wears away and thins the pipe wall.

corrode. Corrosion is a reaction that involves action of an oxidizing agent on a metal. The oxidizing agent is often oxygen dissolved in water. See How Iron Rusts for examples.

The return of metals to their thermodynamically preferred compounds (ores) in the terrestrial environment. See also: Rusting

Chemical attack on metallic surfaces, usually caused by moisture and/or acid dew point excursions.

Deterioration of a metallic material due to a reaction with its environment. Damage to tanks by corrosion is caused when a metal underground tank and its underground surroundings act like a battery. Part of the tank can become negatively charged and another part positively charged. Moisture in the soil provides the connecting link that finally turns on these tank batteries. Then, the negatively charged part of the underground tank system where the current exits from the tank or its piping begins to deteriorate. As electric current passes through this part, the hard metal begins to turn soft, holes form and leaks begin.

A process in which a metal is destroyed by a chemical reaction. When the metal is iron, the process is called rusting.

A dissolving and wearing away of metal caused by a chemical reaction (in this case, between water and the piping that the water contacts).

Deterioration of metal, or concrete from exposure to weather, oxygen, moisture, chemicals, or other environmental conditions in which it is placed. Rust is the most common form of corrosion.

a potentially damaging condition that results from low pH (acidic) conditions. Can cause damage to masonry surfaces and underwater metal parts. Corrosive conditions will make chlorine more irritating and aggressive. Proper pool or spa water chemistry or balancing helps prevent corrosion problems.

The chemical action of electrolyte on a metal that forms a new compound; e.g., dilute sulfuric acid on steel forms the corrosion compound, rust. Battery terminals can be subject to corrosion.

Etching, pitting and other destructive erosion of the spa surfaces and equipment due to low pH or other chemical imbalance.

A new, accelerated coating test by ASTM, called "Standard Practice for Cyclic Salt Fog/UV Exposure of Painted Metal," evaluates the interactive effects of weathering and corrosion. The test combines alternating exposures in a fog/dry cabinet and a UV/condensation cabinet. 148

the deterioration of material, usually metal

Deterioration of metal surfaces caused by low pH, low total alkalinity, low calcium hardness or a combination of the three. High velocity in spas can cause erosion.

Biomaterials where the elemental constituents are lost to the adjacent environment due to corrosion mechanisms. The same type phenomena exists for carbons (conductors) and ceramics (nonconductors) although at reduced magnitudes. The polymers undergo biodegradation due to preferential leach- ing of lower molecular weight fractions and poly- meric chain breakdown by enzymatic cleavage and/or hydration and/or oxidation-reduction processes.

The deterioration of metal by chemical or electrochemical reactions with sustances in the environment.

A chemical reaction caused by unbalanced water, which causes metals or minerals to dissolve.

a state of deterioration in metals caused by oxidation or chemical action

erosion by chemical action

The degradation of metal over an extended period of time.

Corrosion of all interior surfaces of the boiler is caused by the chlorides of magnesium and sodium, and by mineral and organic acids, and appears to be largely conditional upon the presence of free oxygen.

Aluminium has very high resistance against corrosion. When aluminium is produced it is spontaneously covered by a thin but effective coating of oxide which protects the aluminium from further oxidation. If the coating of oxide is damaged mechanically this coating will be renewed immediately.

Destruction of a metal by chemical or electro-chemical reaction with its environment.

The destructive chemical reaction of a liquid electrolyte with a reactive material — e.g., dilute sulfuric acid on iron, producing corrosion products such as rust. Battery terminals are subject to corrosion if they are not properly maintained.

To attach exposed metal surfaces by atmospheric and other influences, usually an oxidation process such as rust on steel. Covering Power - The expression, in square feet per gallon, of the ability of a coating to cover a surface.

the process by which metals are oxidized in the atmosphere.

Reaction of metal with atmospheric elements, such as oxygen or water, to cause oxidation.

Chemical deterioration due to prolonged adverse conditions. Corrosion resistant alloys are generally non-ferrous.

Deteriorative loss of a metal as a result of environmental reactions.

the gradual wearing away by rusting or by action of chemicals.

Decomposition or reaction of metal with oxygen, water or other chemicals. Corrosion Inhibitor Pigments Pigmants that retard the corrosion process in substrate.

the act or process of eating or wasting away

chemical breakdown of a material by water and/or air. Rust on cars is a common product of corrosion.

General External - Metal loss due to electrochemical, galvanic, microbiological, or other attack on the pipe due to environmental conditions surrounding the pipe. General Internal - Metal loss due to chemical or other attack on the steel from liquids on the inside of the pipe. Electrochemical attack can also occur in local cells, but this condition is less frequent. Pit - Local concentrated-cell corrosion on the external or internal surfaces that results from the generation of a potential (voltage) difference set up by variations in oxygen concentrations within and outside the pit. The oxygen-starved pit acts as the anode and the pipe surface acts as the cathode. Stress Corrosion Cracking - A progressive intergranular and/or transgranular cracking that results from a combination of applied tensile stress, cathodic protection currents, and a suitable corrosive environment.

Chemical or electrochemical reaction between a metal and the local environment whether wet or dry which results in deterioration in the properties of the metal.

The chemical reaction of air, moisture, or corrosive materials on a surface; also called oxidation. The process of wearing away the surface of a solid.

The attack of metal parts by acid from the electrolyte; it is the result of lack of cleanliness.

Damage to cooling system metal components due to improper coolant protection. Corrosion can lead to component failure, leaks and system plugs and occurs when a coolant is not properly maintained. With traditional coolants, failure to add supplemental coolant additives and chemical filters at the appropriate time may lead to corrosion. Failure to replace a coolant after the manufacturers recommended life may lead to corrosion.

metal oxidation which results in a deterioration of the metal's molecular balance. Its most visible form is rust. It is the speciality of some motorcycles.

the deterioration of metal as a result of the slow action of chemical agents to which metal is exposed, or oxygen, water vapor, carbon dioxide and other substances in the air, water, soil.

Gradual chemical or electrochemical attack on a metal by atmospheric moisture or other agents.

The degradation of a material resulting from an electrochemical reaction between that material and its environment..

Slow destruction of materials by chemical agents and electrochemical reactions. Most common form of corrosion is rust, where oxygen in air reacts with iron to form iron oxide.

When rust, rot or age negatively affect roofing metals.

Deterioration of a material or surface by chemical action. Exposure to solvents or moisture.

Result of chemical reaction between a metal and its environment (i.e., air, water, and impurities in same).

Deterioration of a material by chemical action, usually as a result of galvanic, acid or alkali action of oxidation.

The degradation of metals or alloys due to reaction with their environment. It is accelerated by acids, bases or heats.

The conversion of metals such as steel, iron and brass to their oxide states through an electrochemical reaction. Corrosion is one of the most common and serious problems associated with boilers, cooling towers and closed systems. Cyanuric acid: A stabiliser that works to keep a reserve of "free available" chlorine in pool and spa water, protecting it from direct sunlight. Because their exposure to sunlight is limited, it is not frequently used in spas. It is, however, present in some sanitisers such as trichlor and dichlor. The ideal level is from 50 - 80 ppm in both pools and spas.

Decay, oxidative decomposition, or deterioration of a metal in contact with its environment.

A chemical action that eats into or wears away material from a substance.

The dissolution and wearing away of metal caused by a chemical reaction such as between water and the pipes, chemicals touching a metal surface, or contact between two metals.

The deterioration of metal by chemical or electrochemical reactions with substances in its environment.

When aluminum is exposed to moisture, salt and certain chemicals it tends to oxidize. This discoloration is called corrosion, and is commonly found on wheels when the clearcoat fails or is damaged due to improper wheel weight installation or road damage.

A reaction caused when metal comes into contact with certain elements in the environment, such as airborne pollutants or other chemicals, such as chlorine. Corrosion causes the metal's surface to change or degrade over time. Light corrosion often can be removed via a metal-polishing cloth, paste or solution.

Improper water balance, misuse of acid products, and soft water can cause pitting and etching of your spa/pool equipment.

The deterioration of a metal, caused by the metal's encironment and it's reaction to that environment amascus Steel Created when two types of steel are folded repeatedly during the forging process. This new durable steel retains the properties of the two parent steels, and is very attractive, yet expensive.

attack and slow destruction of the surface of materials by the action of the chemical agents (especially dissolved salts and acids). On metals, corrosion is an oxidation; it is avoided by preliminary treatment such as electrolytic treatments, galvanization, tinning, chromium plating, etc, or by anti-corrosive coatings and paintings.

The deterioration of a material by chemical reaction or galvanic action.

The act or process of corroding.

A chemical action which causes gradual destruction of a surface of a metal by oxidation, electrolysis, or chemical contamination.

Chemical decomposition of the wires in a rope through the action of moisture, acids, alkalines or other destructive agents.

Corrosion: Chemical or electrochemical reaction between a material and it's environment which results in deterioration in the properties of the material.

To be dissolved away, usually by oxidation or acidification. This usually refers to metal loss in cooling systems, often recognized by the local reaction of the dissolved metal with oxygen, carbon dioxide, acids or galvanic action. May result in general (widespread) or pitting loss of the metal.

Corrosion is the slow destruction of materials by chemical agents and electrochemical reactions. The most common kind of corrosion is that of rusting.

Except for gold, metals corrode in sea water. Corroded metals are a special problem. Sometimes iron has disappeared totally, just leaving a cavity inside a concretion, which can be casted (filled with plastic or plaster). Sometimes the metal is still there, but need various conservation treatment. This is described by Donny Hamilton in Methods of Conserving Archaaeological Material from Underwater Sites.

damage resulting from reactive chemicals upon metals

Chemical or electrochemical attack on the surface of a metal

The reaction of metals with other elements the result of which is the formation of various compounds. Water and oxygen are activating agents.

pitting or green oxidation that appears on the surfaces of coins. Light corrosion is called “porosity,” moderate corrosion is called “granularity,” and heavy corrosion is called “pitting.

Corrosion occurs when metal is exposed to conditions which cause the breakdown of the metal through an exchange of ions. In water systems, this term generally refers to the rusting of metalic pipelines. Over time, corrosion will weaken the structure of the metallic pipes, resulting in leaks or breaks. Corrosion also can build up on the inside surface of the pipes, reducing water flow and contributing to water taste, odor, or color problems.

Decay. Oxidation or deterioration due to interaction with the environment.

Oxidation or pitting of the metal on the surfaces of the coin.

The deterioration of a metal due to reaction with atmospheric elements. Nickel plating is admired for its anti-corrosive qualities.

Corrosion is an undesired process where a metal is converted to one of its compounds, e.g. rusting.

The wearing away or dissolving of metal caused by a chemical reaction (i.e., as water on pipes that water contacts or chemicals touching a metal surface.)

oxidation-reduction reaction where electrons are released at the anode and taken up at the cathode.

Rust and resultant pitting in a gun bore.

The chemical or electrochemical reaction between a material, usually a metal, and its environment that produces a deterioration of the material and its properties.

pitting, etching or erosion of pool equipment & surfaces caused by LOW pH and/or other chemical imbalances.

Degradation of the metal substrate by oxidation. That is the formation of an oxide layer on the metal surface. This process requires that the metal surface be exposed to oxygen, and is favoured in the presence of water. In the case of iron and steel, corrosion is often referred to as rusting.

The attack upon metals by chemical agents converting them to nonmetallic products. Stainless steel has a passive film created by the presence of chromium (and often other alloying elements, nickel, molybdenum) that resists this process.

Damage which occurs on the surface of some coins, generally due to improper storage. Corrosion is caused when a chemical reaction, such as rust, actually eats into the metal.

Chemical reaction of oxygen and moisture, or corrosive materials on a metal surface. Usually referred to as rusting or oxidation.

chemical action which caused destruction of the surface of a material by oxidation or chemical combination. Also caused by reduction of the electrical efficiency between a metal and a contiguous substance or to the disintegrating effects of strong electrical currents or ground return currents in electrical systems. The latter is known as electrolytic corrosion.

condition that weakens many types of metal by certain chemical or electrochemical reactions with its environment. Many metals can wear, become embrittled and fatigued from this process. Titanium is an outstanding product when considering this issue because of its tremendous resistance to corrosion.

The process of oxidisation of a metal, generally, for paint makers, steel or aluminium. Seen on iron or steel as rusting, it may be accelerated by moisture or chemical in the air. It has been estimated that the annual cost of corrosion in the UK alone is about £3 bn. A year.

The conversion of metals into oxides, hydrated oxides, carbonates or other compounds due to the action of air or water, or both. Salts and sulphur are also important sources of corrosion. Removal of the solids and water reduces the effect or speed of corrosion in many cases. Symbol designating pressure drop. The difference of pressure between two points, generally measured at the inlet and outlet of a filter, separator/filter etc. Normally measured in pounds per square inch (psi), inches of mercury (In.Hg.) or bar.

The eating and wearing away of a material by chemical action (pitting, rusting).

Eating away of metal surfaces in your system caused by water that's out of balance.

Chemical or electrical removal of material from a metal, main problem for us is the interior walls of the water jackets. Remember, not only can it cause the very expensive replacement of blocks, heads, housings etc., but the deposits have to go somewhere, and usually that's into the radiator tubes to block them. A double needless expense

The destructive disintegration of a metal by electrochemical means.

A term that generally describes the results of a chemical reaction that has a negative effect on quality of a part or its surface. Corrosion can exist between dissimilar metals and metals and solutions, liquid or airborne.

The deterioration of a metal by chemical or electrochemical reaction with its environment.

See "etching."

The effects of an acidic pool environment; one in which the pH and/or alkalinity are very low. Corrosion in the form of etching, pitting or erosion of pool equipment and surfaces is the result. May also be caused by misuse of acid or by soft water.

The gradual wearing away of metal spa parts, usually caused by chemical action. Generally, corrosion is caused by low pH or by water with levels of TA, CH, pH or sanitizer which are outside the recommended ranges.

The wasting away of metals as a result of chemical action. In a boiler, usually caused by the presence of O2, CO2, or an acid.

The deterioration of metals or similar material in and around the pool water. Usually corrosion is caused by low calcium hardness and can be corrected by adding water hardness increaser.

The chemical reaction of a metal with its environment, resulting in metal oxide, e.g. rust.

chemical reaction on the surface of a coin.

Process by which metals are eaten away by salt water and air.

The electrochemical degradation of metals or alloys due to a reaction with their environment.

The gradual deterioration of metals caused by harsh chemical and environmental conditions.

The gradual decomposition or destruction of a material by oxidation or chemical actions, often due to an electrochemical reaction.

The eating away of the bore because of rusting or the chemical action of salts deposited in the bore by corrosive primers or powders. Cartridge cases can also be corroded by salts or acids.

The gradual deterioration of material by chemical processes, such as oxidation or attack by acids; if caused by an atmospheric effect, a form of weathering. Of great significance is the corrosion due to the combined effects of atmospheric temperature, humidity, and suspended impurities, for example, the rusting of iron, the direct effects upon a surface wetted by acid water, or, indirectly, the rotting of wood caused by the action of fungi or bacteria in the soil and in enclosed spaces. Compare corrasion, erosion. Brooks, C. E. P., 1951: Climate in Everyday Life, 184–189.

Damage that results when reactive chemicals act upon metal. When toning ceases to be a "protective" coating and instead begins to damage a coin, corrosion is the cause. Usually confined to copper, nickel and silver regular issues, although patterns in aluminum, white metal, tin, etc., also are subject to this harmful process.

Reaction of a metallic material with its environment.

The deterioration of material by chemical or electrochemical reaction resulting from exposure to weathering, moisture, chemical or other agents in the environment in which it is placed.

The deterioration of metal by chemical or electrochemical reaction resulting from exposure to weathering, moisture, chemicals or other agents or media.

The reaction of a metal to the environment.

Corrosion is deterioration of essential properties in a material due to reactions with its environment. It is the loss of an electron of metals reacting with water or oxygen. Weakening of iron due to oxidation of the iron atoms is a well-known example of electrochemistry (a branch of chemistry that studies the reactions that take place when an ionic and electronic conductor interfere) corrosion.