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Pitting corrosion, or pitting, is a form of extremely localized corrosion that leads to the random creation of small holes in metal. The driving power for pitting corrosion is the depassivation of a small area, which becomes anodic (oxidation reaction) while an unknown but potentially vast area becomes cathodic (reduction reaction), leading to ...
Edema may be described as pitting edema, or non-pitting edema. [32] Pitting edema is when, after pressure is applied to a small area, the indentation persists after the release of the pressure. Peripheral pitting edema, as shown in the illustration, is the more common type, resulting from water retention.
PIT maneuver diagram (animated GIF image) California Highway Patrol cruisers using a PIT maneuver to disable a fleeing vehicle The PIT maneuver (precision immobilization technique [1]), also known as TVI (tactical vehicle intervention), is a law enforcement pursuit tactic in which a pursuing vehicle forces another vehicle to turn sideways abruptly, causing the driver to lose control and stop. [2]
Cavitation damage evident on the propeller of a personal watercraft. Cavitation in fluid mechanics and engineering normally refers to the phenomenon in which the static pressure of a liquid reduces to below the liquid's vapour pressure, leading to the formation of small vapor-filled cavities in the liquid. [ 1 ]
Pitted keratolysis. Pitted keratolysis (also known as keratolysis plantare sulcatum, [1] keratoma plantare sulcatum, [1] and ringed keratolysis[1]) is a bacterial skin infection of the foot. [2] The infection is characterized by craterlike pits on the sole of the feet and toes, particularly weight-bearing areas.
Fretting refers to wear and sometimes corrosion damage of loaded surfaces in contact while they encounter small oscillatory movements tangential to the surface. Fretting is caused by adhesion of contact surface asperities, which are subsequently broken again by the small movement. This breaking causes wear debris to be formed.
Indianapolis Motor Speedway Formula One pit lane and garages (right) adjacent to the oval racing lane. In motorsports, a pit stop is a pause for refuelling, new tyres, repairs, mechanical adjustments, a driver change, as a penalty, or any combination of the above. These stops occur in an area called the pits, most commonly accessed via a pit ...
Myxedema (British English: myxoedema) is a term used synonymously with severe hypothyroidism. However, the term is also used to describe a dermatological change that can occur in hypothyroidism and (rare) paradoxical cases of hyperthyroidism. In this latter sense, myxedema refers to deposition of mucopolysaccharides in the dermis, which results ...