(1) Injection of air or water under high pressure through a tube to the anode area for the purpose of purging the annular space and possibly correcting high resistance caused by gas blocking. (2) In connection with boilers or cooling towers, the process o ...

Conduction of electric current from an underground metallic structure by means of a metallic conductor. Forced drainage is that applied to underground metallic structures by means of an applied electromotive force or sacrificial anode. Natural drainage is ...

A metallic connection that provides electrical continuity between metal structures.

A wood-pulping process in which sodium sulfate is used in the caustic soda pulp-digestion liquor. Also called kraft pulping or sulfate pulping.

See principal stress (normal).

Corrosion resulting from an electrochemical cell caused by a thermal gradient.

The selective leaching or corrosion of a specific constituent (Al, Ni, Mo, Ni) from an alloy.

The weight of an element or group of elements oxidized or reduced at 100~ efficiency by the passage of a unit quantity of electricity. Usually expressed as grams per coulomb.

The potential difference at the junction of two dissimilar substances.

Coating containing zinc powder pigment andan organic resin.

A change in dimensions directly proportional to and in phase with an increase or decrease in applied force.

The formation of complex chemical species by the coordination of groups of atoms termed ligands to a central ion, commonly a metal ion. Generally, the ligand coordinates by providing a pair of electrons that forms an ionic or covalent bond to the central ...

The potential of a metal surface necessary to decompose the electrolyte of a cell or a component/substance thereof.

The destruction of adhesion between a coating and its substrate by products of a cathodic reaction.

The condition of being electrically separated from other metallic structures or the environment.

A treatment of metal in a solution of a hexavalent chromium compound to produce a conversion coating consisting of trivalent and hexavalent chromium compounds.

Corrosion effect on a metal per unit of time. The type of corrosion rate used depends on the technical .system and on the type of corrosion effect. Thus, corrosion rate may be expressed as an increase in corrosion depth per unit of time (penetration rate, ...

(1) Hardening suitable a = b alloys (most often certain copper or titanium alloys) by solution treating and quenching to develop a martensite-like structure. (2) In ferrous alloys, hardening by austenitizing and then cooling at a rate such that a substant ...

Naturally occurring magnetic oxide of iron (Fe3O4).

(1) Burning or corrosive. (2) A hydroxide of a light metal, such as sodium hydroxide or potassium hydroxide.