A metastable lamellar aggregate of ferrite and cementite resulting from the transformation of austenite at temperatures above the bainite range.

A measure of the acidity or alkalinity of a solution; The negative logarithm of the hydrogen-ion activity; it denotes the degree of acidity or basicity of a solution. At 25

Forming an adherent phosphate coating on a metal by immersion in a suitable aqueous phosphate solution. Also called phosphatizing. See also conversion coating.

A coating process whereby the cleaned and masked component to be coated is heated and rotated on a spindle above the streaming vapor generated by melting and evaporating a coating material source bar with a focused electron beam in an evacuated chamber.

The binding of an adsorbate to the surface of a solid by forces whose energy levels approximate those of condensation. Contrast with chemisorption.

A solution or process used to loosen or remove corrosion products such as scale or tarnish.

Removing surface oxides from metals by chemical or electrochemical reaction. Pickling is the removal of any high temperature scale and any adjacent low chromium layer of metal from the surface of stainless steel by chemical means. Where the steel has b ...

Localized corrosion of a metal surface, confined to a point or small area, that takes the form of cavities or pits.

Ratio of the depth of the deepest pit resulting from corrosion divided by the average penetration as calculated from weight loss.

The stress condition in linear elastic fracture mechanics in which there is zero strain in a direction normal to both the axis of applied tensile stress and the direction of crack growth (that is, parallel to the crack front); most nearly achieved in load ...

The stress condition in linear elastic fracture mechanics in which the stress in the thickness direction is zero; most nearly achieved in loading very thin sheet along a direction parallel to the surface of the sheet. Under plane-stress conditions, the pl ...

A thermal spraying process in which the coating material is melted with heat from a plasma torch that generates a nontransferred arc: molten coating material is propelled against the base metal by the hot, ionized gas issuing from the torch.

The permanent (inelastic) distortion of metals under applied stresses that strain the material beyond its elastic limit.

The property that enables a material to undergo permanent deformation without rupture.

(1) The change from the open-circuit electrode potential as the result of the passage of current. (2) A change in the potential of an electrode during electrolysis, such that the potential of an anode becomes more noble, and that of a cathode more active, ...

The reciprocal of polarization resistance (di/dE).

A plot of r urrent density versus electrode potential for a specific electrode-electrolyte combination.

The slope (dE/di) at the corrosion potential of a potential (E)/current density (i) curve. Also used to describe the method of measuring corrosion rates using this slope.

Resin formed by condensation of polybasic and monobasic acids with polyhydric alcohols.

A chain of organic molecules produced by the joining of primary units called monomers.