The maximum current density that can be used to obtain a desired electrode reaction without undue interference such as from polarization.

(1) The relationship between the current density at a point on a surface and its distance from the counter electrode. The greater the ratio of the surface resistivity shown by the electrode reaction to the volume resistivity of the electrolyte, the better ...

An imprecise term used to denote a treatment given cold-worked material to reduce its strength to a controlled level or to effect stress relief. To be meaningful, the type of material, the degree of cold work, and the time-temperature schedule must be sta ...

The difference between the actual electrode potential when appreciable electrolysis begins and the reversible electrode potential.

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

Deposition of a metal or compound on a heated surface by reduction or decomposition of a volatile compound at a temperature below the melting points of the deposit and the base material. The reduction is usually accomplished by a gaseous reducing agent su ...

A visible corrosion product consisting of hydrated oxides of iron. Applied only to ferrous alloys. See also white rust.

(1) Producing a chromate conversion coating on magnesium for temporary protection or for a paint base. (2) The solution that produces the conversion coating.

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 ...

Loss of carbon from the surface layer of a carbon-containing alloy due to reaction with one or more chemical substances in a medium that contacts the surface. See also dealloying.

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

That portion of the base metal that was not melted during brazing, cutting, or welding, but whose microstructure and mechanical properties were altered by the heat; Refers to area adjacent to a weld where the thermal cycle has coused microstructural chang ...

An accelerated corrosion test for some electrodeposits for anodic coatings on aluminum.

Electrodepositing a metal or alloy in an adherent form on an object serving as a cathode.

An instrument for indicating or measuring a small electric current by means of a mechanical motion derived from electromagnetic or electrodynamic forces produced by the current.

Performing a chromate treatment

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

The phenomenon leading to fracture under repeated or fluctuating stresses having a maximum value less than the tensile strength of the material. Fatigue fractures are progressive and grow under the action of the fluctuating stress.

The selective attack of one or more components of a solid solution alloy; eg. dezincification, dealumination etc. See dealloying.

A stress that causes an elastic body to deform (shorten) in the direction of the applied load. Contrast with tensile stress.