Glossary Corrosion: All Listings RSS

Filter listings...

(1) A cathode, usuully corrugated to give variable current densities, that is plated at low current densities to preferentially remove impurities from a plating solution. (2) A substitute cathode that is used during adjustment of operating conditions.

The first stress in a material, usually less than the maximum attainable stress, at which an increase in strain occurs without an increase in stress. Only certain metals - those that exhibit a localized, heterogeneous type of transition from elastic defor ...

Improving paint adhesion on aluminum or aluminum alloys, mainly aircraft skins, by treatment with a solution of' chromic acid. Also called chromodizing or chromatizing. Not to be confused with chromating or chromizing.

A generic term covering several processes applicable to steel that change the chemical composition of the surface layer by absorption of carbon, nitrogen, or a mixture of the two and, by diffusion, create a concentration gradient. The outer portion, or ca ...

A list of elements arranged according to their standard electrode potentials, with "noble" metals such as gold being positive and "active" metals such as zinc being negative.

A coating consisting of' a compound of the surface metal, produced by chemical or electrochemical treatments of the metal. Examples include chromate coatings on zinc, cadmium, magnesium, and aluminum and oxide and phosphate coatings on steel. See also chr ...

Corrosion that is accompanied by a flow of electrons between cathodic and anodic areas on metallic surfaces.

The condition of an electrode when the rate of anodic dissolution just balances the rate of cathodic plating.885

Cooking liquor from the kraft pulping process produced by recausticizing green liquor with lime.

The absorption of carbon into a metal surface; may or may not be desirable.

The stress at which a material exhibits a specified deviation from proportionality of stress and strain. An onset of 0.2% is used for many metals.

A condition in which the interfacial tension between a liquid and a solid is such that the contact angle is 0

(1) Permanently damaging a metal or alloy by heating to cause either incipient melting or intergranular oxidation. See also over-heating. (2) In grinding, getting the work hot enough to cause discoloration or to change the microstructure by tempering or h ...

See conductivity.

A fractographic term describing ductile fracture that occurs through the formation and coalescence of microvoids along the fracture path. The fracture surface of such a ductile fracture appears dimpled when observed at high magnification and usually is mo ...

A thin, inhibiting paint, usually chromate pigmented with a polyvinyl butyrate binder.

A coating developed on a metal surface by a high temperature diffusion process (as carburization, calorizing, or chromizing).

The maximum stress that a material is capable of sustaining without any permanent strain (deformation) remaining upon complete release of the stress.

An electrode widely used as a reference electrode of known potential in electrometric measurement of acidity and alkalinity, corrosion studies, voltammetry, and measurement of the potentials of other electrodes. See also electrode potential, reference ele ...

KQ.

Provisional value for plane-strain fracture toughness.