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Polished metal strip of specified size and weight used to detect the corrosive action of liquid or gas products or to test the efficiency of corrosion-inhibitor additives. Also known as corrosion coupon.



Related Terms

PAPERCUTTER

[DESENG] Ahand-operateddevice to cut and trim paper, consisting of a cutting blade bolted at one end to a ruled board; when the blade is drawn flush with the board, which has a metal strip at the cutting edge, a shearing action takes place which cuts the paper cleanly and evenly.

CHEMICAL ION PUMP

A vacuum pump whose pumping action is based on evaporation of a metal whose vapor then reacts with the chemically active molecules in the gas to be evacuated.

GAS SCRUBBING

Removal of gaseous or liquid impurities from a gas by the action of a liquid; the gas is contacted with the liquid which removes the impurities by dissolving or by chemical combination.

LIQUID EROSION

Removal of films or metal by mechanical action and corrosion of active metal.

CONDENSE

Action of changing a gas or vapor to a liquid.

CHANNEL IRON

A metal strip or beam with a U-shape.

PILOT HOLE

  1. In metal-forming operations, a prepunched hole in a metal strip into which the pilot component of the die enters in order to assure precise registration of the strip at each work station. 2. A small hole drilled ahead of a larger borehole. 3. A hole drilled in a piece of wood to serve as a guide for a nail or a screw or for drilling a larger hole.

DRIP EDGE

A metal strip that extends beyond the other parts of the roof and is used to direct rainwater off.

CAR SEAL

Metal strip and lead fastener used for locking freight car or truck doors. Seals are numbered for record purposes.

TUBERCLE

A protective crust of corrosion products (rust) which builds up over a pit caused by the loss of metal due to corrosion.

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