Fracture of a metal during quenching from elevated temperature. Most frequently observed in hardened carbon steel, alloy steel, or tool steel parts of high hardness and low toughness. Cracks often emanate from fillets, holes, corners, or other stress rais ...

In electroplating, a supplementary anode positioned so as to raise the current density on a certain area of the cathode and thus obtain better distribution of plating.

Electrochemical system consisting of an anode and a cathode immersed in an electrolyte. The anode and cathode may be separate metals or dissimilar areas on the same metal. The cell includes the external circuit, which permits the flow of electrons from th ...

The process in which a metal fractures prematurely under conditions of simultaneous corrosion and repeated cyclic loading at lower stress levels or fewer cycles than would be required in the absence of the corrosive environment.

An anode that is insoluble in the electrolyte under the conditions prevailing in the electrolysis.

Splitting (fracture) of a crystal on a crystallographic plane of' low index.

Ability of a metal to withstand corrosion in a given corrosion system.

A composite metal containing, two or more layers that have been bonded together. The bonding may have been accomplished by co-rolling, co-extrusion, welding, diffusion bonding, casting, heavy chemical deposition, heavy electroplating, or explosive claddin ...

The maximum compressive stress a material is capable of developing. With a brittle material that fails in compression by fracturing, the compressive strength has a definite value. In the case of ductile, malleable, or semiviscous materials (which do not f ...

The mass of unit volume of a material at a specified temperature.

A compound with a central atom or ion bound to a group of ions or molecules surrounding it. Also called coordination complex. See also chelate, complexation, and ligand.

A cell developed in an electrolyte resulting from electrical contact between two dissimilar metals. See galvanic corrosion.

A movement of electrons in an external circuit connecting an anode and cathode in a corrosion cell; the current flow is arbitrarily considered to be in an opposite direction to the electron flow.

The number of cycles of stress that can be sustained prior to failure under a stated test condition.

Foreign substance which comes from the environment, adhering to a surface of a material

The development of slight breaks in a coating that do not penetrate to the underlying surface.

A decrease in the polarization of an electrode; the elimination or reduction of polarization by physical or chemical means; depolarization results in increased corrosion.

The net transfer of electric charge per unit time. Also called electric current. See also current density.

A galvanic cell resulting from difference in oxygen concentration between two locations; See differential aeration cell.

(Galvanic Corrosion) Corrosion resulting from dissimilar metal contact.