A chemical substance or combination of substances that, when present in the environment, prevents or reduces corrosion without significant reaction with the components of the environment.

The environmental, social, and economic impacts of producing a good or service that are not directly reflected in the market price of the good or service.

In chemistry,a homogeneous dispersion of two or more kinds of molecular or ionic species. Solution may be composed of any combination of liquids, solids, or gases, but they always consist of a single phase.

Formation of isolated particles of corrosion products beneath a metal surface. This results from the prcferential reactions of certain alloy constituents to inward diffusion of oxygen, nitrogen, or sulfur.

Morse Code Distress Signal (

A horseshoe-shaped or circular reef of coral surrounding a lagoon.

A device built into or installed above a combustion appliance to assure the escape of combustion byproducts, to prevent backdrafting of the appliance, or to neutralize the effects of the stack action of the chimney or vent on the operation of the applianc ...

A form of steam engine where a piston moves back and forth inside a cylinder, transmitting its motion to a driving shaft by a connecting rod and crank.

The central heating or cooling system contains a fan that gets its air supply through these ducts, which ideally should be installed in every room of the house. The air from a room will move towards the lower pressure of the return duct.

An air conditioning system that comes in two to five pieces: one piece contains the compressor, condenser, and a fan; the others have an evaporator and a fan. The condenser, installed outside the house, connects to several evaporators, one in each room to ...

The process of payment clearance between two branches of the same.

Aqueous solution that contains 1 mole (gram-molecular weight) of solute in 1 L of the solution.

Plastic deformation by the irreversible shear displacement (translation) of one part of a crystal relative to another in a definite crystallographic direction and usually on a specific crystallographic plane. Sometimes called glide.

Corrosion resulting from direct current flow through paths other than the intended circuit. For example, by an extraneous current in the earth.

An area of low barometric pressure, with its attendant system of winds. Also called a depression or cyclone.

An energy system in which the fuel production equipment is in close proximity, or connected to, the fuel using equipment.

A container that holds rock used as the thermal mass to store solar energy in a solar heating system.

The heavy oxide layer formed during hot fabrication or heat treatment of metals.

Particle on which the freezing of water occurs.

Any object used to increase the drag of a boat and slow her down. Typically shaped like a parachute or cone opened underwater, drogues decrease a boat's speed in heavy weather. Also see sea anchor.