A change in any part of the corrosion system caused by corrosion.

Any of the elements of the halogen family, consisting of fluorine, chlorine, bromine, iodine, and astatine.

Surface having a thin, tightly adhering, oxidized skin (from straw to blue in color), extending in from the edge of a coil or sheet.

Corrosion that occurs under some coatings in the form of randomly distributed threadlike filaments.

Direct current supplied by a device employing a power source external to the electrode system of a cathodic protection installation.

The development of loose removable powder at the surface of an organic coating usually caused by weathering.

A compound that causes oxidation, thereby itself being reduced.

A process of removing soil, scale, or corrosion products from a metal surface by subjecting it as an electrode to an electric current in an electrolytic bath.

A thin, not necessarily visible, layer of material.

Corrosion in which cobalt is selectively leached from cobalt-base alloys, such as Stellite

(1) An organic compound in which atoms form more than one coordinate bond with metals in solution. (2) A substance used in metal finishing to control or eliminate certain metallic ions present in undesirable quantities.

The process of prior removal of the active corrosive constituents usually oxygen, from a corrosive liquid by controlled corrosion of expendable metal or by other chemical means, thereby making the liquid less corrosive.

The ability of a solution to give satisfactory plating at very low current densities. a condition that exists in recesses and pits. This term suggests an ability to cover, but not necessarily to build up, a uniform coating, whereas throwing power suggests ...

An aqueous solution containing one gram equivalent of the active reagent in 1L of the solution.

The molecule, ion, or group bound to the central atom in a chelate or a coordination compound.

Progressive loss of original material from a solid surface due to continuing exposure to cavitation.

The potential of an electrode measured with respect to a reference electrode or another electrode when no current flows to or from it.

A chemical process involving formation of a heterocyclic ring compound that contains at least one metal cation or hydrogen ion in the ring.

Depositing a metallic coating on a metal immersed in a liquid solution, without the aid of an external electric current. Also called dip plating.

Localized corrosion frequently observed in oilwell tubing in which a circumfrential attack is observed near a region of metal "upset".